US3131203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenazasiline compounds
Assignee: Merck and Co Inc
•
Filing: 1961-03-31
•
Granted: 1964-04-28
•
Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Erickson
- 👤 Roger J Tull
- 👤 William A Sklarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:40
CPC Classifications
C; C10; C10M; C10M3/00; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C07F7/081; C07F7/0812; C07F7/0816; C07F7/12; C10M2227/00; C10M2227/04; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
PHENAZASILINE COMPOUNDS HAVING THE FORMULA:
Claim 2
Dependent Claim
5 words
PHENAZASILINE COMPOUNDS HAVING THE FORMULA:
Claim 3
Dependent Claim
5 words
PHENAZASILINE COMPOUNDS HAVING THE FORMULA:
Claim 4
Dependent Claim
5 words
PHENAZASILINE COMPOUNDS HAVING THE FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |