US2694079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrohalogenation process
Assignee: Pharmacia and Upjohn Co
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Filing: 1952-04-18
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Granted: 1954-11-09
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Expires: 1972-04-18
Abstract
No abstract record available.
Inventors
- 👤 Roman P Holysz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:28
CPC Classifications
C; C07; C07J; C07J7/00; C07J7/0005; C07J7/001; C07J7/0015; C07J7/002; C07J5/00; C07J5/0046; C07J5/0053; C07J9/00; C07J9/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A PROCESS FOR THE INTRODUCTION OF A DOUBLE BOND BETWEEN CARBON ATOMS VICINAL TO A KETONE GROUP IN KETOSTEROIDS WHICH COMPRISES REACTING A KETOSTEROID, HAVING A HALOGEN OF ATOMIC WEIGHT FROM 35 TO 80 ON THE CARBON ATOM ALPHA TO THE KETONE GROUP AND A HYDROGEN ON THE NEXT ADJACENT CARBON, WITH A HALIDE OF A METAL HAVING AN IONIC RADIUS OF 0.20 A. TO 0.80 A., INCLUSIVE, IN A BASIC ORGANIC SOLVENT, TO FORM AN A,B-UNSATURATED KETOSTEROID.
Claim 2
Dependent Claim
78 words
A PROCESS FOR THE INTRODUCTION OF A DOUBLE BOND BETWEEN CARBON ATOMS VICINAL TO A KETONE GROUP IN KETOSTEROIDS WHICH COMPRISES REACTING A KETOSTEROID, HAVING A HALOGEN OF ATOMIC WEIGHT FROM 35 TO 80 ON THE CARBON ATOM ALPHA TO THE KETONE GROUP AND A HYDROGEN ON THE NEXT ADJACENT CARBON, WITH A HALIDE OF A METAL HAVING AN IONIC RADIUS OF 0.20 A. TO 0.80 A., INCLUSIVE, IN A BASIC ORGANIC SOLVENT, TO FORM AN A,B-UNSATURATED KETOSTEROID.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |