Patent US2345917A successfully refreshed from Google Patents.
Patent US5323778A successfully refreshed from Google Patents.
US2877212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes from difunctional polymers of conjugated dienes
Assignee: EIDP Inc
•
Filing: 1954-10-11
•
Granted: 1959-03-10
•
Expires: 1974-10-11
Abstract
No abstract record available.
Inventors
- 👤 Kurt L Seligman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:51
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/69; C08C; C08C19/00; C08C19/30; C08C19/34; C08C19/36; C08C19/38; C08F; C08F36/00; C08F36/02; C08F36/04; C08G18/08; C08G18/10; C08L; C08L75/00; C08G2101/00; C08G2380/00; Y; Y10; Y10S; Y10S273/00; Y10S273/08; Y10S528/00; Y10S528/905; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A POLYMERIC PRODUCT, CAPABLE OF BEING CURED, SAID PRODUCT BEING COMPRISED ESSENTIALLY OF STRUCTURAL UNITS HAVING THE FORMULA:
Claim 2
Dependent Claim
18 words
A POLYMERIC PRODUCT, CAPABLE OF BEING CURED, SAID PRODUCT BEING COMPRISED ESSENTIALLY OF STRUCTURAL UNITS HAVING THE 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 |