Patent US4379804A successfully refreshed from Google Patents.
Patent US2064565A successfully refreshed from Google Patents.
Patent US2915524A successfully refreshed from Google Patents.
US2915524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Naphthyl pyridinium inner salts
Assignee: Parke Davis and Co LLC
•
Filing: 1958-04-28
•
Granted: 1959-12-01
•
Expires: 1978-04-28
Abstract
No abstract record available.
Inventors
- 👤 Truitt Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:23
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/16; C07D213/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A COMPOUND OF THE STRUCTURAL FORMULA,
Claim 2
Dependent Claim
6 words
A COMPOUND OF THE STRUCTURAL FORMULA,
References Cited (Backward Citations)
US2541473A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |