US2667494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thiophene derivatives
Assignee: Monsanto Chemicals Ltd
•
Filing: 1948-08-05
•
Granted: 1954-01-26
•
Expires: 1968-08-05
Abstract
No abstract record available.
Inventors
- 👤 William S Emerson
- 👤 Jr Tracy M Patrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:45
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/06; C07D333/22; C08; C08K; C08K5/00; C08K5/0008; C08K5/0025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A CHEMICAL COMPOUND HAVING THE STRUCTURE:
Claim 2
Dependent Claim
6 words
A CHEMICAL COMPOUND HAVING THE STRUCTURE:
References Cited (Backward Citations)
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US1526300A
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US1906939A
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US2149335A
Cited
US2105808A
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US2281583A
Cited
US2504903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |