Patent US3178445A successfully refreshed from Google Patents.
US3178445A
Expired / Lapsed
US
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New thiophene derivatives
Assignee: BASF Schweiz AG
•
Filing: 1963-07-25
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Granted: 1965-04-13
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Expires: 1983-07-25
Abstract
No abstract record available.
Inventors
- 👤 Maeder Erwin
- 👤 Anliker Rudolf
- 👤 Liechti Peter
- 👤 Siegrist Adolf Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:07
CPC Classifications
C; C07; C07D; C07D413/00; C07D413/14; C08; C08K; C08K5/00; C08K5/36; C08K5/45
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)
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) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |