US2574484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic dehydration process
Assignee: Ortho Pharmaceutical Corp
•
Filing: 1947-08-09
•
Granted: 1951-11-13
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Expires: 1967-08-09
Abstract
No abstract record available.
Inventors
- 👤 Karmas George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:43
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/06; C07C403/12; C07C403/10; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A PROCESS FOR DEHYDRATING A COMPOUND WITH THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
11 words
A PROCESS FOR DEHYDRATING A COMPOUND WITH THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
US2373956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |