Patent US3050486A successfully refreshed from Google Patents.
US3050486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating composition for paper comprising a mineral pigment and an acrylic acid-acrylamide-acrylonitrile copolymer as principal coating component
Assignee: Wyeth Holdings LLC
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Filing: 1959-05-13
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Granted: 1962-08-21
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Expires: 1979-05-13
Abstract
No abstract record available.
Inventors
- 👤 Daniel D Ritson
- 👤 Suen Tzeng Jiueq
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:54
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/56; D21H19/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A FLUID AQUEOUS COATING COMPOSITION FOR WATER-LAID CELLULOSE WEBS COMPRISING A HYDROPHILIC INORGANIC MINERAL PIGMENT AS COATING COMPONENT AND A WATER-SOLUBLE TRIPOLYMER AS PRINCIPAL ADHESIVE COMPONENT, SAID TERIPOLYMER BEING FORMED BY POLYMERIZING A MIXTURE OF 5% TO 50% BY WEIGHT OF ACRYLIC ACID, 20% TO 85% BY WEIGHT OF ACRYLAMIDE, AND 5% TO 50% BY WEIGHT OF ACRYLONITRILE, HAVING A "RELATIVE VISCOSITY" TO AQUEOUS AMMONIA IN EXCESS OF 15, AND BEING SOLUBLE IN ALL PROPORTIONS IN WATER AT 35*C. THE RELATILVE AMOUNTS OF EACH OF THE CONTITUENTS OF SAID POLYMER BEING CHOSEN SO AS TO BE REPRESENTED BY ANY POINT WITHIN PARALLELOGRAM ABCD OF THE ANNEXED DRAWING SAID COATING COMPOSITION HAVING A PH BETWEEN ABOUT 3.5 AND 8.5.
Claim 2
Dependent Claim
118 words
A FLUID AQUEOUS COATING COMPOSITION FOR WATER-LAID CELLULOSE WEBS COMPRISING A HYDROPHILIC INORGANIC MINERAL PIGMENT AS COATING COMPONENT AND A WATER-SOLUBLE TRIPOLYMER AS PRINCIPAL ADHESIVE COMPONENT, SAID TERIPOLYMER BEING FORMED BY POLYMERIZING A MIXTURE OF 5% TO 50% BY WEIGHT OF ACRYLIC ACID, 20% TO 85% BY WEIGHT OF ACRYLAMIDE, AND 5% TO 50% BY WEIGHT OF ACRYLONITRILE, HAVING A "RELATIVE VISCOSITY" TO AQUEOUS AMMONIA IN EXCESS OF 15, AND BEING SOLUBLE IN ALL PROPORTIONS IN WATER AT 35*C. THE RELATILVE AMOUNTS OF EACH OF THE CONTITUENTS OF SAID POLYMER BEING CHOSEN SO AS TO BE REPRESENTED BY ANY POINT WITHIN PARALLELOGRAM ABCD OF THE ANNEXED DRAWING SAID COATING COMPOSITION HAVING A PH BETWEEN ABOUT 3.5 AND 8.5.
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) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |