US2843568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric polyether-polyurethanes
Assignee: EIDP Inc
•
Filing: 1955-01-31
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Granted: 1958-07-15
•
Expires: 1975-01-31
Abstract
No abstract record available.
Inventors
- 👤 Anthony F Benning
- 👤 James G Burt
- 👤 Edward K Gladding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:10
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5072; C08G18/487; C08G18/4875; C08G18/4879; Y; Y10; Y10S; Y10S528/00; Y10S528/905; Y10S528/906
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
11 words
A POLYMER BEING COMPRISED ESSENTIALLY OF STRUCTURAL UNITS HAVING THE FORMULA
References Cited (Backward Citations)
US2060715A
Cited
FR845917A
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US2292406A
Cited
FR52968E
Cited
US2602075A
Cited
US2692874A
Cited
FR1074451A
Cited
US2702797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |