US2953572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyridinecarboxylic acid 1-oxides
Assignee: Union Carbide Corp
•
Filing: 1958-08-25
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Granted: 1960-09-20
•
Expires: 1978-08-25
Abstract
No abstract record available.
Inventors
- 👤 Jesse T Dunn
- 👤 Heywood Donald Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:52
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/89
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
AN UNSUBSTITUTED PYRIDINEPOLYCARBOXYLIC ACID 1OXIDE.
Claim 2
Dependent Claim
5 words
AN UNSUBSTITUTED PYRIDINEPOLYCARBOXYLIC ACID 1OXIDE.
Claim 3
Dependent Claim
8 words
A NEW COMPOSITION OF MATTER, 2,6-PYRIDINEDICARBOXYLIC ACID 1-OXIDE.
Claim 4
Dependent Claim
8 words
A NEW COMPOSITION OF MATTER, 2,6-PYRIDINEDICARBOXYLIC ACID 1-OXIDE.
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) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |