Patent US2764559A successfully refreshed from Google Patents.
US2764559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethers from 1, 4-epoxycyclohexane
Assignee: EIDP Inc
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Filing: 1952-03-25
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Granted: 1956-09-25
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Expires: 1972-03-25
Abstract
No abstract record available.
Inventors
- 👤 John P Wilkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:01
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A NEW COMPOSITION OF MATTER COMPRISING A POLYMERIC MATERIAL HAVING A MELTING POINT OF AT LEAST 325* C. AND A MOLECULAR WEIGHT OF BETWEEN ABOUT 4,000 AND 10,000 AND CAPABLE OF BEING FORMED INTO SHAPED ARTICLES SUCH AS FILMS, SAID POLYMERIC MATERIAL CONTAINING THE FOLLOWING 1,4 UNIT
Claim 2
Dependent Claim
47 words
A NEW COMPOSITION OF MATTER COMPRISING A POLYMERIC MATERIAL HAVING A MELTING POINT OF AT LEAST 325* C. AND A MOLECULAR WEIGHT OF BETWEEN ABOUT 4,000 AND 10,000 AND CAPABLE OF BEING FORMED INTO SHAPED ARTICLES SUCH AS FILMS, SAID POLYMERIC MATERIAL CONTAINING THE FOLLOWING 1,4 UNIT
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) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |