Patent US2900368A successfully refreshed from Google Patents.
US2900368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes of polyalkylene etherthioether glycols
Assignee: EIDP Inc
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Filing: 1956-05-23
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Granted: 1959-08-18
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Expires: 1976-05-23
Abstract
No abstract record available.
Inventors
- 👤 Frederic B Stilmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:37
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/52; G; G04; G04B; G04B37/00; G04B37/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A POLYMER CONSISTING ESSENTIALLY OF STRUCTURAL UNITS HAVING THE FORMULA
Claim 2
Dependent Claim
10 words
A POLYMER CONSISTING ESSENTIALLY OF STRUCTURAL UNITS HAVING THE FORMULA
References Cited (Backward Citations)
US2216044A
Cited
FR894134A
Cited
US2518245A
Cited
US2606173A
Cited
US2692874A
Cited
US2692873A
Cited
US2853472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |