Patent US2853474A successfully refreshed from Google Patents.
US2853474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New lactone
Assignee: Imperial Chemical Industries Ltd
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Filing: 1955-08-23
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Granted: 1958-09-23
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Expires: 1975-08-23
Abstract
No abstract record available.
Inventors
- 👤 Reynolds Reginald John William
- 👤 Vickers Edward Jervis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:03
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/682; C08G63/6822
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
RESINOUS POLYMERS HAVING THE RECURRING STRUCTURAL UNIT
Claim 2
Dependent Claim
7 words
RESINOUS POLYMERS HAVING THE RECURRING STRUCTURAL UNIT
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) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |