US2557673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-substituted derivatives of 2, 3-dihydrothianaphthene-1-dioxide
Assignee: Texaco Inc
•
Filing: 1949-09-26
•
Granted: 1951-06-19
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Expires: 1969-09-26
Abstract
No abstract record available.
Inventors
- 👤 Wilbur H Mckellin
- 👤 Frederick G Bordwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:21
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/50; C07D333/52; C07D333/62; C07D333/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
SUBSTITUTED 2,3-DIHYDROTHIANAPHTHENE-1-DIOXIDE HAVING THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
7 words
SUBSTITUTED 2,3-DIHYDROTHIANAPHTHENE-1-DIOXIDE HAVING THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
US1913484A
Cited
US2482631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |