US3317546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-hydroxyalkyl-piperidine carboxylic acids
Assignee: Reilly Tar and Chemical Corp
•
Filing: 1964-04-10
•
Granted: 1967-05-02
•
Expires: 1984-04-10
Abstract
No abstract record available.
Inventors
- 👤 Francis E Cislak
- 👤 Charles K Mcgill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:22
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/60; C07D211/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
N-HYDROXYALKYL-PIPERIDINE CARBOXYLIC ACIDS OF THE FORMULA:
Claim 2
Dependent Claim
6 words
N-HYDROXYALKYL-PIPERIDINE CARBOXYLIC ACIDS OF THE 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) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |