US3090725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphorylated quaternary ammonium compounds of improved oral absorption
Assignee: SmithKline Beecham Corp
•
Filing: 1961-02-14
•
Granted: 1963-05-21
•
Expires: 1981-02-14
Abstract
No abstract record available.
Inventors
- 👤 Copp Frederick Charles
- 👤 Mccoubrey Arthur
- 👤 Billinghurst John Evlyn Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:56
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/091
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A THERAPEUTICALLY ACCEPTABLE PHOSPHATE ESTER OF A QUATERNARY AMMONIUM COMPOUND WHICH CONTAINS A BENZYLAMMONIUM CATION HAVING THE FORMULA
Claim 2
Dependent Claim
18 words
A THERAPEUTICALLY ACCEPTABLE PHOSPHATE ESTER OF A QUATERNARY AMMONIUM COMPOUND WHICH CONTAINS A BENZYLAMMONIUM CATION HAVING THE FORMULA
References Cited (Backward Citations)
US2622083A
Cited
US2725394A
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US2890984A
Cited
US2910403A
Cited
US2953591A
Cited
US2916510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |