Patent US2893992A successfully refreshed from Google Patents.
US2893992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
I ii i i
Assignee: —
•
Filing: —
•
Granted: 1959-07-07
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Expires: 1976-07-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:20
CPC Classifications
C; C07; C07D; C07D243/00; C07D243/06; C07D243/10; C07D243/14; C07D243/16; C07D243/18; C07D243/20; C07D401/00; C07D401/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A COMPOUND SELECTED FROM THE GROUP REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
10 words
A COMPOUND SELECTED FROM THE GROUP REPRESENTED BY THE FORMULA
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) | 1962-07-06 | 1963-01-05 | 1963-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-06 | 1967-01-05 | 1967-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-06 | 1971-01-05 | 1971-07-07 | $7700.00 | Window Closed / Lapsed |