Patent US3328342A successfully refreshed from Google Patents.
US3328342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of polycarbonamides with organic phosphinates and manganous hypophosphite
Assignee: EIDP Inc
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Filing: 1962-09-18
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Granted: 1967-06-27
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Expires: 1982-09-18
Abstract
No abstract record available.
Inventors
- 👤 Reaves Albert Louie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:54
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/32; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5313
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PROCESS OF PREPARING A STABILIZED FILAMENT OF A SYNTHETIC LINEAR FIBER-FORMING POLYCARBONAMIDE HAVING RECURRING HYDROGEN-BEARING AMIDE GROUPS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN WHICH COMPRISES PREPARING THE POLYMER BY METL POLYMERIZATION IN THE PRESENCE OF A DISSOLVED PHOSPHINATE COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
46 words
A PROCESS OF PREPARING A STABILIZED FILAMENT OF A SYNTHETIC LINEAR FIBER-FORMING POLYCARBONAMIDE HAVING RECURRING HYDROGEN-BEARING AMIDE GROUPS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN WHICH COMPRISES PREPARING THE POLYMER BY METL POLYMERIZATION IN THE PRESENCE OF A DISSOLVED PHOSPHINATE COMPOUND OF THE FORMULA
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) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |