Patent US2652775A successfully refreshed from Google Patents.
Patent US2579427A successfully refreshed from Google Patents.
US2579427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Allyl carbonates, polymers, and copolymers
Assignee: Wingfoot Corp
•
Filing: 1947-09-09
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Granted: 1951-12-18
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Expires: 1967-09-09
Abstract
No abstract record available.
Inventors
- 👤 Clyde E Gleim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:55
CPC Classifications
C; C08; C08F; C08F18/00; C08F18/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
THE CARBONATE HAVING THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
6 words
THE CARBONATE HAVING THE STRUCTURAL FORMULA
References Cited (Backward Citations)
US2390551A
Cited
US2379261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |