| Patents for D21H 13 - Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material (4,906) |
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| 05/25/1982 | US4331508 Photographic support |
| 04/13/1982 | US4324495 Fiber feeder pulley cleaning system |
| 03/23/1982 | CA1120348A1 Method of forming glass fiber dispersions with cationic quaternary ammonium surfactants having at least two long chain groups |
| 03/23/1982 | CA1120205A1 Method of producing glass mats using novel glass fiber dispersion composition |
| 03/16/1982 | US4320198 Fiber production from continuous cultivation of micro-organisms |
| 03/16/1982 | CA1119863A1 Paper products |
| 03/02/1982 | CA1119206A1 Fibrous sheet materials |
| 02/16/1982 | US4315880 Manufacture of fibrous products |
| 02/09/1982 | CA1118040A1 Nonwoven fibrous substrate for battery separator |
| 02/03/1982 | EP0045135A1 Method of making a laminated sheet material |
| 02/03/1982 | EP0044868A1 Separator with improved tensile strength for starved electrolyte lead/acid battery. |
| 01/27/1982 | EP0044617A1 Process for the preparation of cardboard of the corrugated type |
| 01/20/1982 | EP0044178A2 Fibrous composite materials and the production and use thereof |
| 01/20/1982 | EP0044161A2 Fibrous composite materials and the production and use thereof |
| 01/20/1982 | EP0044160A1 Fibrous composite materials and the production and use thereof |
| 01/19/1982 | US4311732 Primer composition and a process for producing a coated product using the same |
| 01/13/1982 | EP0043555A1 Paper-like polyester fiber sheet and process for producing the same |
| 01/12/1982 | CA1116067A1 Corrugated cardboard having thermoplastic fibrils |
| 12/30/1981 | EP0042716A1 Process for preparing multi-layer structures from sheets containing synthetic fibres |
| 12/22/1981 | CA1114564A1 Dimensionally stable cellulosic backing web |
| 12/22/1981 | CA1114563A1 Method for the production of fibrous mats |
| 12/15/1981 | US4306059 Shaped products of alpha-glucan |
| 12/15/1981 | CA1114120A1 Device or apparatus for preparing fibrous materials suitable for the manufacture of synthetic paper |
| 12/08/1981 | CA1113661A1 Composite material |
| 12/02/1981 | EP0040833A1 Papery product |
| 12/01/1981 | CA1113208A1 Preparation of hydrophilic polyolefin fibers for use in papermaking |
| 11/04/1981 | EP0039292A1 Sheet material which can be converted into a finished product by moulding, embossing or thermoforming, comprising reinforcing fibres and a powdery thermoplastic resin, and process for preparing said material |
| 10/27/1981 | US4297139 Gelation of a glass-ceramic body of a lithium- or sodium-containing mica; physical properties |
| 10/21/1981 | EP0038136A1 Fibrous materials |
| 10/13/1981 | US4294655 Method and apparatus for forming fiberglass mats |
| 10/06/1981 | US4293378 Enhanced wet strength filter mats to separate particulates from fluids and/or coalesce entrained droplets from gases |
| 09/29/1981 | CA1109709A1 Absorbent papers |
| 09/29/1981 | CA1109618A1 Process for continuous preparation of fibrous polymer crystals |
| 09/15/1981 | US4289580 Heat seal fibrous web and method of its manufacture |
| 09/08/1981 | US4288287 Photographic support |
| 09/01/1981 | US4286999 Method of improving properties of ceramic fibers |
| 08/25/1981 | US4286030 Cured, cellulose fibers and thermoplastic fibers |
| 08/20/1981 | WO1981002368A1 Separator with improved tensile strength for starved electrolyte lead/acid battery |
| 08/18/1981 | US4284471 Dewatering, shaping on wire |
| 08/18/1981 | US4284470 Impregnated with bitumens |
| 08/11/1981 | US4283186 Method of forming cigarette filter material |
| 08/05/1981 | EP0032928A1 Process for the preparation of fibers |
| 07/21/1981 | US4279979 Thermoplastic web comprising wood pulp and heat bonded polyamide |
| 07/21/1981 | US4279695 Process for the manufacture of composite materials |
| 07/15/1981 | EP0031832A1 Sheets products and preparation process thereof. |
| 06/23/1981 | US4275105 Stabilized rayon web and structures made therefrom |
| 06/23/1981 | US4274917 Paper products |
| 06/23/1981 | US4274916 Quaternized zcrylamide copolymer |
| 06/23/1981 | US4274914 Filter material |
| 06/03/1981 | EP0029572A1 Polyoxymethylene fibrides, process for their manufacture and their use |
| 05/28/1981 | WO1981001429A1 Heat seal fibrous web and method of its manufacture |
| 05/26/1981 | US4269886 Novel glass fiber mat |
| 05/20/1981 | EP0028909A1 Thixotropic agent and compositions incorporating it |
| 05/20/1981 | EP0028729A1 Process for the continuous production by the paper-making technique of thin porous foils, and products obtained |
| 05/19/1981 | US4268351 Modified urea formaldehyde resin fiber paper |
| 05/19/1981 | CA1101258A1 Fibrous products |
| 05/19/1981 | CA1101157A1 Semisynthetic paper structure on a urea basis |
| 05/12/1981 | US4267016 Polyvinyl alcohol fiber for binding a fibrous sheet and a process for the preparation thereof |
| 05/05/1981 | US4265704 Method of dispersing bundles of glass fibers for making glass fiber mats by the wet-laid process |
| 05/05/1981 | US4265703 Method of preparing a fibrous structure containing metallic fibers |
| 04/29/1981 | EP0027706A1 Latex bound non-asbestos paper |
| 04/29/1981 | EP0027705A1 Starch bound non-asbestos paper |
| 04/28/1981 | CA1099926A1 Method of producing a mineral fiber product |
| 04/22/1981 | EP0027113A1 Process for making a non-woven alginate fabric useful as a wound dressing. |
| 04/21/1981 | US4263093 Method for retaining textured surface of pressed ceiling board |
| 04/07/1981 | US4260565 Dissolving incompatible polymers in heptane or toluene, flash-spinning, fibrids |
| 03/24/1981 | US4257842 Using cellulose and fibers of a thermoplastic polymer |
| 03/17/1981 | US4256801 Also comprising cellulose fibers, oil-resistant elastomer sizing, and graphite and diatomaceous earth particles; car transmissions, clutches, and brakes |
| 03/17/1981 | CA1097466A1 Process for the production of paper containing starch fibers and the paper produced thereby |
| 02/24/1981 | CA1096289A1 Sheet-type wall covering or ceiling covering |
| 02/19/1981 | WO1981000422A1 Process for the preparation of fibers |
| 02/17/1981 | US4251320 Method of producing a mineral fiber product |
| 02/05/1981 | WO1981000268A1 Sheet products and preparation process thereof |
| 02/03/1981 | US4248664 Fibrous sheet materials |
| 01/27/1981 | CA1094280A1 Sheet type wallcovering or ceiling covering |
| 01/20/1981 | US4245689 Dimensionally stable cellulosic backing web |
| 01/14/1981 | EP0022182A1 Synthetic polyester pulp and process for preparing same |
| 01/07/1981 | EP0020884A1 Manufacture of flat flexible products based on mineral fibres |
| 01/07/1981 | EP0020672A1 Fiber material and process for its preparation. |
| 12/30/1980 | US4242404 High-strength glass fiber mat particularly useful for roofing products |
| 12/16/1980 | US4239519 Inorganic gels and ceramic papers, films, fibers, boards, and coatings made therefrom |
| 12/16/1980 | CA1091413A1 Process for preparing fibrils for use in the manufacture of paper |
| 12/09/1980 | US4238280 Heat consolidation of thermoplastic fiber paper |
| 12/09/1980 | CA1091073A1 Paper composition |
| 11/26/1980 | EP0019465A1 High strength glass fiber mat particularly useful for roofing products, built-up roofing membranes and systems and method of making such products |
| 11/26/1980 | EP0019113A1 Aromatic polyamide paper-like sheet and processes for producing the same |
| 11/18/1980 | US4234652 With occuled substances |
| 11/12/1980 | EP0018961A2 Carrier material |
| 11/11/1980 | CA1089224A1 Wall coverings |
| 10/30/1980 | WO1980002300A1 Man-made filaments and wound dressings containing them |
| 10/07/1980 | US4226633 Raw composition for carbon articles |
| 10/01/1980 | EP0016659A1 Inorganic gels and ceramic papers, films, fibres and boards; processes for production thereof |
| 10/01/1980 | EP0016534A1 Improvements in or relating to roof walkways |
| 09/23/1980 | US4224103 Bonding composition for incombustible fibrous materials |
| 09/17/1980 | EP0015338A1 A process for improving the tear strength of water-laid cellulose paper sheets and a water-laid cellulose paper sheet so prepared |
| 08/26/1980 | US4219512 Manufacture of fibrids from polymers |
| 08/26/1980 | CA1084403A1 Reinforced sheet-type wallcovering |
| 08/20/1980 | EP0014534A1 Preparation of hydrophilic polyolefin fibres and paper containing these fibres |
| 08/07/1980 | WO1980001576A1 Sheet material containing exfoliated vermiculite |
| 08/05/1980 | CA1082861A1 Aggregate of fibrous material used for synthetic pulp and process for preparing same |