US3000849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear copolycondensation product comprising recurring aromatic carbonate and carboxylic acid ester units in the polymer chain, and article formed thereof
Assignee: Bexford Ltd
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Filing: 1959-01-07
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Granted: 1961-09-19
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Expires: 1979-01-07
Abstract
No abstract record available.
Inventors
- 👤 Clachan Margaret Loudon
- 👤 Mcpherson Norman Spencer
- 👤 Tatchell Keith Reid
- 👤 Abbott Terence Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:19
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/64; G; G03; G03C; G03C1/00; G03C1/76; G03C1/795
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
LINEAR COPOLYCONDENSATION PRODUCT COMPRISING RECURRING AROMATIC CARBONATE UNITS AND CARBOXYLIC ACID ESTER UNITS IN THE POLYMER CHAIN, THE CARBONATE UNITS BEING THE PRODUCTS OF CONDENSING A (DIMONOHYDROXY-ARYL)-ALKANE OF THE FORMULA:
Claim 2
Dependent Claim
30 words
LINEAR COPOLYCONDENSATION PRODUCT COMPRISING RECURRING AROMATIC CARBONATE UNITS AND CARBOXYLIC ACID ESTER UNITS IN THE POLYMER CHAIN, THE CARBONATE UNITS BEING THE PRODUCTS OF CONDENSING A (DIMONOHYDROXY-ARYL)-ALKANE OF THE FORMULA:
References Cited (Backward Citations)
US2789971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |