US2623889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diketo unsaturated acid and esters
Assignee: Interchemical Corp
•
Filing: 1951-01-04
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Granted: 1952-12-30
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Expires: 1971-01-04
Abstract
No abstract record available.
Inventors
- 👤 Nichols Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:42
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/40; C07C59/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
A MEMBER OF THE GROUP CONSISTING OF DIKETO-9, 10-OCTADECENOIC ACID AND ESTERS THEREOF, SAID DIKETO ACID HAVING AN EMPIRICAL FORMULA OF C18H30O4, AND A MELTING POINT OF 112-113* C.
Claim 2
Dependent Claim
29 words
A MEMBER OF THE GROUP CONSISTING OF DIKETO-9, 10-OCTADECENOIC ACID AND ESTERS THEREOF, SAID DIKETO ACID HAVING AN EMPIRICAL FORMULA OF C18H30O4, AND A MELTING POINT OF 112-113* C.
References Cited (Backward Citations)
US2446849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |