US2633451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photochemical production of 7-bromocholesteryl esters
Assignee: Wander AG
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Filing: 1951-05-22
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Granted: 1953-03-31
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Expires: 1971-05-22
Abstract
No abstract record available.
Inventors
- 👤 Schaltegger Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:14
CPC Classifications
C; C07; C07J; C07J9/00; C07J75/00; Y; Y10; Y10S; Y10S204/00; Y10S204/902; Y10S204/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A PROCESS WHICH COMPRISES SUBJECTING CHOLEXTERYLESTER DISSOLVED IN CARBON DISULPHIDE TO THE ACTION OF BROMINE WHILE IRRADIATING THE REACTION MEDIUM WITH LIGHT OF A WAVELENGTH BETWEEN 300 AND 600 MU SO AS TO PRODUCE 7-BROMOCHOLESTERYL ESTER.
Claim 2
Dependent Claim
36 words
A PROCESS WHICH COMPRISES SUBJECTING CHOLEXTERYLESTER DISSOLVED IN CARBON DISULPHIDE TO THE ACTION OF BROMINE WHILE IRRADIATING THE REACTION MEDIUM WITH LIGHT OF A WAVELENGTH BETWEEN 300 AND 600 MU SO AS TO PRODUCE 7-BROMOCHOLESTERYL ESTER.
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) | 1956-03-30 | 1956-09-29 | 1957-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-30 | 1960-09-29 | 1961-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-30 | 1964-09-29 | 1965-03-31 | $7700.00 | Window Closed / Lapsed |