Patent US1932341A successfully refreshed from Google Patents.
Patent US3672975A successfully refreshed from Google Patents.
US3672975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymerization of polyacrylic acid within nylon structures
Assignee: United States Department of the Army
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Filing: 1970-06-09
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Granted: 1972-06-27
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Expires: 1990-06-09
Abstract
Abstract COPOLYMERIZATION OF POLYACRYLIC ACID WITHIN A NYLON STRUCTURE IS ACCOMPLISHED BY DIFFUSING AN AQUEOUS SOLUTION OF ACRYLIC ACID POLYMER, HAVING A MOLECULAR WEIGHT RANGE OF FROM 2000 TO 20,000 AND AT A PH OF FROM 1.5 TO 3.5, UNDER ELEVATED TEMPERATURES INTO THE NYLON STRUCTURE, DRYING, AND THEREAFTER HEAT CURING SAID DIFFUSED ACRYLIC ACID POLYMER TO EFFECT COPOLYMERIZATION WITH THE NYLON.
Inventors
- 👤 Gilbert N Arons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:29
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |