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Patent US2623902A successfully refreshed from Google Patents.
US2623902A
Expired / Lapsed
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Bis-quaternary ammonium salts
Assignee: Sharp and Dohme Inc
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Filing: 1950-03-15
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Granted: 1952-12-30
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Expires: 1970-03-15
Abstract
No abstract record available.
Inventors
- 👤 Frank S Crossley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:57
CPC Classifications
C; C07; C07D; C07D245/00; C07D245/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
Z,Z-BIS-(P-(BENZYL - DIMETHYL - AMMONIUM) PHENYL)-LOWER ALKANE DIHALIDES IN WHICH Z IS A WHOLE NUMBER FROM 1 TO 3 INCLUSIVE DENOTING THE POSITION OF SUBSTITUTION.
Claim 2
Dependent Claim
25 words
Z,Z-BIS-(P-(BENZYL - DIMETHYL - AMMONIUM) PHENYL)-LOWER ALKANE DIHALIDES IN WHICH Z IS A WHOLE NUMBER FROM 1 TO 3 INCLUSIVE DENOTING THE POSITION OF SUBSTITUTION.
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) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |