US2610191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tetra (carboxy phenyl) thiophene and method of making same
Assignee: California Research LLC
•
Filing: 1949-09-26
•
Granted: 1952-09-09
•
Expires: 1969-09-26
Abstract
No abstract record available.
Inventors
- 👤 Jr William G Toland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:19
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/06; C07D333/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
TETRA (CARBOXY PHENYL) THIOPHENE.
Claim 2
Dependent Claim
4 words
TETRA (CARBOXY PHENYL) THIOPHENE.
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) | 1955-09-09 | 1956-03-10 | 1956-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-09 | 1960-03-10 | 1960-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-09 | 1964-03-10 | 1964-09-09 | $7700.00 | Window Closed / Lapsed |