US2536977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing substituted thioacetamides
Assignee: GAF Chemicals Corp
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Filing: 1949-12-16
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Granted: 1951-01-02
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Expires: 1969-12-16
Abstract
No abstract record available.
Inventors
- 👤 Henry G Derbyshire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:58
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/60; C07D277/84; C07D277/62; C07D277/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A PROCESS FOR THE PREPARATION OF A SUBSTITUTED THIOACETAMIDE DYESTUFF INTERMEDIATE CHARACTERIZED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
17 words
A PROCESS FOR THE PREPARATION OF A SUBSTITUTED THIOACETAMIDE DYESTUFF INTERMEDIATE CHARACTERIZED BY THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |