Patent US4647863A successfully refreshed from Google Patents.
US3119731A
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Retention of thermoplastic material on pulp by a reaction product of a nitrogenous base and a salt of carboxylic acid
Assignee: Zellsloff Fabrik Waldhof AG
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Filing: 1961-11-06
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Granted: 1964-01-28
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Expires: 1981-11-06
Abstract
No abstract record available.
Inventors
- 👤 Strole Ulrich
- 👤 Thomich Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:32
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54; D21H17/55; D21H13/00; D21H13/36; D21H13/38; D21H13/42; D21H23/00; D21H23/76; D21H23/765
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A FIBROUS SHEET, COMPRISING A COMBINATION, A LAYER OF HAPHAZARDLY ARRANGED FIBROUS MATERIAL; AT LEAST ONE PLASTIC MATERIAL SELECTED FROMTHE GROUP CONSISTING OF POLYETHYLENE, POLYPROPYLENE, POLYAMIDES, POLYESTERS, AND POLYMERIZATES AND MIXED POLYMERIZATES OF VINYLCHLORIDE, VINYLIDENECHLORIDE, VINYLACETATE, VINYLACETAL, CHLOROPRENE, LATEX, STYRENE, BUTADIENE, ACRYLIC ACID ESTER AND ACRLYONITRILE SUBSTANTIALLY EVENLY DISTRIBUTED THROUGHOUT SAID LAYER; AND THE REACTION PRODUCT OF A WATER-SOLUBLE NITROGENOUS BASE OF HIGH MOLECULAR WEIGHT SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE IMINE, POLYPROPYLENE IMINE AND POLYVINYL AMINE, AND A WATER-SOLUBLE SALT OF AN ORGANIC POLYCARBOXYLIC ACID OF HIGH MOLECULAR WEIGHT SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM AND AMMONIUM SALTS OF ACRYLIC ACID AND METHACRYLIC ACID, AND MIXED POLYMERIZATES OF ACRYLIC ACID AND ACRYLIC ACID AMIDE CONTAINING A RELATIVELY LARGE PROPORTION OF CARBOXYL GROUPS INTERPOSED BETWEEN AND BINDING SAID FIBROUS AND SAID PLASTIC MATERIAL TO EACH OTHER.
Claim 2
Dependent Claim
139 words
A FIBROUS SHEET, COMPRISING A COMBINATION, A LAYER OF HAPHAZARDLY ARRANGED FIBROUS MATERIAL; AT LEAST ONE PLASTIC MATERIAL SELECTED FROMTHE GROUP CONSISTING OF POLYETHYLENE, POLYPROPYLENE, POLYAMIDES, POLYESTERS, AND POLYMERIZATES AND MIXED POLYMERIZATES OF VINYLCHLORIDE, VINYLIDENECHLORIDE, VINYLACETATE, VINYLACETAL, CHLOROPRENE, LATEX, STYRENE, BUTADIENE, ACRYLIC ACID ESTER AND ACRLYONITRILE SUBSTANTIALLY EVENLY DISTRIBUTED THROUGHOUT SAID LAYER; AND THE REACTION PRODUCT OF A WATER-SOLUBLE NITROGENOUS BASE OF HIGH MOLECULAR WEIGHT SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE IMINE, POLYPROPYLENE IMINE AND POLYVINYL AMINE, AND A WATER-SOLUBLE SALT OF AN ORGANIC POLYCARBOXYLIC ACID OF HIGH MOLECULAR WEIGHT SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM AND AMMONIUM SALTS OF ACRYLIC ACID AND METHACRYLIC ACID, AND MIXED POLYMERIZATES OF ACRYLIC ACID AND ACRYLIC ACID AMIDE CONTAINING A RELATIVELY LARGE PROPORTION OF CARBOXYL GROUPS INTERPOSED BETWEEN AND BINDING SAID FIBROUS AND SAID PLASTIC MATERIAL TO EACH OTHER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |