US2558949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric polyether polyhydric alcohols
Assignee: Celanese Coatings Co
•
Filing: 1945-09-18
•
Granted: 1951-07-03
•
Expires: 1965-09-18
Abstract
No abstract record available.
Inventors
- 👤 Greenlee Sylvan Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:53
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/14; C08G59/1433; C08G59/1438; C08G59/1455
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
COMPLEX POLYMERIC POLYHYDRIC ALCOHOLS WHICH ARE POLYMERIC POLYETHER DERIVATIVES OF DIHYDRIC PHENOLS, WHICH DIHYDRIC PHENOLS ARE FREE FROM FUNCTIONAL GROUPS OTHER THAN PHENOLIC HYDROXYL GROUPS, SAID POLYHYDRIC ALCOHOLS HAVING THE FOLLOWING GENERAL FORMULA
Claim 2
Dependent Claim
33 words
COMPLEX POLYMERIC POLYHYDRIC ALCOHOLS WHICH ARE POLYMERIC POLYETHER DERIVATIVES OF DIHYDRIC PHENOLS, WHICH DIHYDRIC PHENOLS ARE FREE FROM FUNCTIONAL GROUPS OTHER THAN PHENOLIC HYDROXYL GROUPS, SAID POLYHYDRIC ALCOHOLS HAVING THE FOLLOWING GENERAL FORMULA
References Cited (Backward Citations)
US2060715A
Cited
US2174527A
Cited
US2213477A
Cited
GB518057A
Cited
US2324483A
Cited
US2292406A
Cited
US2411029A
Cited
US2503726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-02 | 1955-01-01 | 1955-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-02 | 1959-01-01 | 1959-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-02 | 1963-01-01 | 1963-07-03 | $7700.00 | Window Closed / Lapsed |