US2506536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-carboxyalkylthiophane-3, 4-dicarboxylic acid
Assignee: Wyeth Holdings LLC
•
Filing: 1945-07-16
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Granted: 1950-05-02
•
Expires: 1965-07-16
Abstract
No abstract record available.
Inventors
- 👤 Bernard R Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:18
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/26; C07D333/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
CHEMICAL COMPOUNDS HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
6 words
CHEMICAL COMPOUNDS HAVING THE GENERAL FORMULA:
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) | 1953-05-01 | 1953-10-31 | 1954-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-01 | 1957-10-31 | 1958-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-01 | 1961-10-31 | 1962-05-02 | $7700.00 | Window Closed / Lapsed |