US2948724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogenated derivatives of tetrahydro-1-naphthyl cyclic amidines
Assignee: SAHYUN
•
Filing: 1958-04-21
•
Granted: 1960-08-09
•
Expires: 1978-04-21
Abstract
No abstract record available.
Inventors
- 👤 Sahyun Melville
- 👤 John A Faust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:00
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
HALOGENATED 1,2,3,4-TETRAHYDRO-1-NAPHTHYL CYCLIC AMIDINES HAVING THE FORMULA:
Claim 2
Dependent Claim
7 words
HALOGENATED 1,2,3,4-TETRAHYDRO-1-NAPHTHYL CYCLIC AMIDINES HAVING THE FORMULA:
References Cited (Backward Citations)
US2731471A
Cited
US2824120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |