US2765334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of sym-homopinic acid
Assignee: Individual
•
Filing: 1953-12-11
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Granted: 1956-10-02
•
Expires: 1973-12-11
Abstract
No abstract record available.
Inventors
- 👤 James S Stinson
- 👤 Ray V Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:05
CPC Classifications
C; C07; C07C; C07C55/00; C07C55/26; C07C2601/00; C07C2601/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
A PROCESS OF PRODUCING SYM-HOMOPINIC ACID, COMPRISING, REACTING PINONIC ACID WITH AN AMOUNT OF A MIXTURE OF A SUBSTANTIALLY ANHYDROUS LIQUID AMINE WITH SULFUR PROVIDING FROM ABOUT 11/2 TO 21/2 ATOMS OF SULFUR AND FROM ABOUT 11/2 TO 21/2 AMINO GROUPS PER MOLECULE OF PINONIC ACID, AND SAPONIFYING THE REACTION PRODUCT, BY REACTING IT WITH AQUEOUS SODIUM HYDROXIDE, ACIDIFYING THE SAPONIFICATION PRODUCTS AND ISOLATING THE HOMOPINIC ACID PRODUCED.
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) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |