US2602092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of compounds having vitamin a activity
Assignee: Ortho Pharmaceutical Corp
•
Filing: 1948-03-05
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Granted: 1952-07-01
•
Expires: 1968-03-05
Abstract
No abstract record available.
Inventors
- 👤 Oroshnik William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:21
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/06; C07C403/08; C07C403/10; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
THE METHOD COMPRISING HYDROGENATING A COMPOUND OF THE FORMULA
Claim 2
Independent Claim
9 words
THE METHOD COMPRISING HYDROGENATING A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2369157A
Cited
US2369159A
Cited
US2369161A
Cited
US2369164A
Cited
US2382068A
Cited
US2412465A
Cited
US2425201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-01 | 1955-12-31 | 1956-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-01 | 1959-12-31 | 1960-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-01 | 1963-12-31 | 1964-07-01 | $7700.00 | Window Closed / Lapsed |