US2831000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partial esters of hexahydrokojic acid
Assignee: Pfizer Inc
•
Filing: 1955-08-05
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Granted: 1958-04-15
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Expires: 1975-08-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Jay S Buckley
- 👤 Russell D Drinkard
- 👤 Paul D Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:55
CPC Classifications
C; C07; C07D; C07D309/00; C07D309/02; C07D309/08; C07D309/10; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A PARTIAL FATTY ACID ESTER OF HEXAHYDROKOJIC ACID WHEREIN THE ACYL GROUP MOIETY IS AN ALIPHATIC HYDROCARBON.
Claim 2
Dependent Claim
17 words
A PARTIAL FATTY ACID ESTER OF HEXAHYDROKOJIC ACID WHEREIN THE ACYL GROUP MOIETY IS AN ALIPHATIC HYDROCARBON.
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) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |