Patent US2668847A successfully refreshed from Google Patents.
US2668847A
Expired / Lapsed
US
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Thioesters and process
Assignee: Union Carbide Corp
•
Filing: 1948-01-28
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Granted: 1954-02-09
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Expires: 1968-01-28
Abstract
No abstract record available.
Inventors
- 👤 Lawrence W Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:04
CPC Classifications
C; C07; C07C; C07C323/00; C07C323/50; C07C323/51; C07C323/52; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/372; C08K5/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
AN ESTER OF A THIOPOLYCARBOXYLIC ACID HAVING A STRUCTURE REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
13 words
AN ESTER OF A THIOPOLYCARBOXYLIC ACID HAVING A STRUCTURE REPRESENTED BY THE FORMULA
References Cited (Backward Citations)
US1652099A
Cited
US2176423A
Cited
US2121617A
Cited
FR845793A
Cited
US2268185A
Cited
US2212141A
Cited
US2356586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |