Patent US2878248A successfully refreshed from Google Patents.
US2878248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carboxy-esters of hydroxybenzimidazolyl-stilbenes
Assignee: STWB Inc
•
Filing: 1956-04-02
•
Granted: 1959-03-17
•
Expires: 1976-04-02
Abstract
No abstract record available.
Inventors
- 👤 Nathan N Crounse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:42
CPC Classifications
C; C11; C11D; C11D9/00; C11D9/04; C11D9/44; C11D9/448; C07; C07D; C07D235/00; C07D235/02; C07D235/04; C07D235/20; C11D3/00; C11D3/40; C11D3/42; D; D06; D06L; D06L4/00; D06L4/60; D06L4/607; D06L4/614; D06L4/621; D06L4/636
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A CARBOXY-ESTER HAVING THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
6 words
A CARBOXY-ESTER HAVING THE STRUCTURAL FORMULA
References Cited (Backward Citations)
US2515173A
Cited
US2667458A
Cited
US2376743A
Cited
US2338782A
Cited
US2356445A
Cited
GB588972A
Cited
US2488094A
Cited
US2624710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |