Patent US2592191A successfully refreshed from Google Patents.
US2592191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary ammonium salts of nu-(3, 3-diphenylpropyl) pyrrolidine
Assignee: STWB Inc
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Filing: 1949-09-16
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Granted: 1952-04-08
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Expires: 1969-09-16
Abstract
No abstract record available.
Inventors
- 👤 Ruddy Arlo Wayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:48
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A QUATERNARY AMMONIUM SALT OF THE FORMULA
Claim 2
Dependent Claim
7 words
A QUATERNARY AMMONIUM SALT OF THE FORMULA
References Cited (Backward Citations)
US2152047A
Cited
FR884569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |