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Patent US3637595A successfully refreshed from Google Patents.
US3637595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
P-oxybenzoyl copolyesters
Assignee: BERNARD E NOWAK
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Filing: 1969-05-28
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Granted: 1972-01-25
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Expires: 1989-05-28
Abstract
Abstract A POLYESTER OF RECURRING MOIETIES OF FORMULAE I, II AND III: -(O-1,4-PHENYLENE)-CO)P (I) -(CO-PHENYLENE-CO)Q- (II) -(O-PHENYLENE-((X)M-PHENYLENE)N-O)R- (III) WHEREIN X IS -O- OR -SO2-; M IS 0 OR 1; N IS 0 OR 1; AND P, Q AND R ARE PREFERABLEY PRESENT IN CERTAIN DEFINED RATIOS.
Inventors
- 👤 Steve G Cottis
- 👤 James Economy
- 👤 Bernard E Nowak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:55
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19; C08G63/60; C08G63/605; C08G63/68; C08G63/688
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |