US2877215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction product of phosphoric acid with a dioxolane ester-ethylenically unsaturated monomer copolymer and process for making same
Assignee: EIDP Inc
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Filing: 1956-08-10
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Granted: 1959-03-10
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Expires: 1976-08-10
Abstract
No abstract record available.
Inventors
- 👤 James C Fang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:30
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/40; C08F2800/00; C08F2800/10; C08F2800/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
THE POLYMERIC REACTION PRODUCT OF (A) PHOSPHORIC ACID AND (B) A PREFORMED COPOLYMERE OF (1) A SUBSTITUTED DIOXOLANE ESTER HAVING THE EMPIRICAL FORMULA
Claim 2
Dependent Claim
23 words
THE POLYMERIC REACTION PRODUCT OF (A) PHOSPHORIC ACID AND (B) A PREFORMED COPOLYMERE OF (1) A SUBSTITUTED DIOXOLANE ESTER HAVING THE EMPIRICAL 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) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |