US2628971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of alkylxanthic formic acid
Assignee: Wyeth Holdings LLC
•
Filing: 1947-06-25
•
Granted: 1953-02-17
•
Expires: 1967-06-25
Abstract
No abstract record available.
Inventors
- 👤 Booth Robert Ben
- 👤 Light Charles Elsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:28
CPC Classifications
C; C07; C07C; C07C329/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
AN ESTER OF ALKYLXANTHICFORMIC ACID HAVING THE FORMULA
Claim 2
Dependent Claim
8 words
AN ESTER OF ALKYLXANTHICFORMIC ACID HAVING THE 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) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |