Patent US3339696A successfully refreshed from Google Patents.
Patent US2567351A successfully refreshed from Google Patents.
US2567351A
Expired / Lapsed
US
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Process for the manufacture of benzhydryl ethers
Assignee: Parke Davis and Co LLC
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Filing: 1946-08-05
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Granted: 1951-09-11
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Expires: 1966-08-05
Abstract
No abstract record available.
Inventors
- 👤 Jr George Rieveschl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:08
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
PROCESS FOR OBTAINING A BASICALLY SUBSTITUTED BENZHYDRYL ETHER COMPOUND OF THE CLASS CONSISTING OF A FREE BASE AND ITS ACID ADDITION SALTS, SAID FREE BASE HAVING THE FORMULA,
Claim 2
Dependent Claim
28 words
PROCESS FOR OBTAINING A BASICALLY SUBSTITUTED BENZHYDRYL ETHER COMPOUND OF THE CLASS CONSISTING OF A FREE BASE AND ITS ACID ADDITION SALTS, SAID FREE BASE HAVING THE FORMULA,
References Cited (Backward Citations)
US862675A
Cited
US1543287A
Cited
US1836047A
Cited
US1894865A
Cited
US2136604A
Cited
US2234933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |