Patent US2842600A successfully refreshed from Google Patents.
US2842600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of vitamin a esters and ethers
Assignee: Ortho Pharmaceutical Corp
•
Filing: 1956-06-19
•
Granted: 1958-07-08
•
Expires: 1976-06-19
Abstract
No abstract record available.
Inventors
- 👤 Oroshnik William
- 👤 Alexander D Mebane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:25
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/06; C07C403/08; C07C403/02; C07C403/10; C07C403/12; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
9 words
THE METHOD COMPRISING TREATING A COMPOUND OF THE FORMULA
Claim 2
Independent Claim
9 words
THE METHOD COMPRISING TREATING A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
5 words
A COMPOUND HAVING THE FORMULA
Claim 4
Dependent Claim
5 words
A COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US2587457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |