US2956986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear polyurethane-semicarbazide
Assignee: Solutia Inc
•
Filing: 1958-09-10
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Granted: 1960-10-18
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Expires: 1978-09-10
Abstract
No abstract record available.
Inventors
- 👤 Witt Hobson D De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:05
CPC Classifications
C; C08; C08G; C08G73/00; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08G18/3823; C08G18/3834; Y; Y10; Y10S; Y10S528/00; Y10S528/903; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A FIBER-FORMING POLYURETHANE-SEMICARBAZIDE COMPRIDING THE REACTION PRODUCT IN ABOUT EQUIMOLAR AMOUNTS OF A DIISOCYANATE OF THE GENERAL FORMULA
Claim 2
Dependent Claim
18 words
A FIBER-FORMING POLYURETHANE-SEMICARBAZIDE COMPRIDING THE REACTION PRODUCT IN ABOUT EQUIMOLAR AMOUNTS OF A DIISOCYANATE OF THE GENERAL FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |