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US2921075A
Expired / Lapsed
US
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Carbamidomethyl quaternary salts of tropine
Assignee: US Vitamin and Pharmaceutical Corp
•
Filing: 1958-11-26
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Granted: 1960-01-12
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Expires: 1978-11-26
Abstract
No abstract record available.
Inventors
- 👤 Seymour L Shapiro
- 👤 Freedman Louis
- 👤 Soloway Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:17
CPC Classifications
C; C07; C07D; C07D451/00; C07D451/02; C07D451/04; C07D451/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
THE N-SUBSTITUTED CARBAMIDOMETHYL QUATERNARY SALT OF TROPINE OF THE FOLLOWING STRUCTURE
Claim 2
Dependent Claim
11 words
THE N-SUBSTITUTED CARBAMIDOMETHYL QUATERNARY SALT OF TROPINE OF THE FOLLOWING STRUCTURE
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) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |