US3331854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel furan and thiophene compounds
Assignee: Wyeth Holdings LLC
•
Filing: 1964-12-14
•
Granted: 1967-07-18
•
Expires: 1984-12-14
Abstract
No abstract record available.
Inventors
- 👤 Huffman Kenneth Robert
- 👤 Ullman Edwin Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:03
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/91; C07D219/00; C07D219/04; C07D219/06; C07D307/78; C07D307/79; C07D307/80; C07D311/00; C07D311/02; C07D311/04; C07D311/22; C07D311/78; C07D311/80; C07D311/82; C07D311/84; C07D311/86; C07D333/00; C07D333/50; C07D333/52; C07D333/54; C07D333/56; C07D333/76; C07D493/00; C07D493/02; C07D493/08; G; G03; G03C; G03C1/00; G03C1/72; G03C1/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
DE1076702B
Cited
US3012042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |