Patent US3163643A successfully refreshed from Google Patents.
US3163643A
Expired / Lapsed
US
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Derivatives of 3, 4-dihydro-2h-1, 2, 4-benzothiadiazine-1, 1-dioxide
Assignee: BASF Corp
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Filing: 1959-04-17
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Granted: 1964-12-29
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Expires: 1979-04-17
Abstract
No abstract record available.
Inventors
- 👤 Stevens George De
- 👤 Werner Lincoln Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:00
CPC Classifications
C; C07; C07D; C07D285/00; C07D285/15; C07D285/16; C07D285/18; C07D285/20; C07D285/22; C07D285/24; C07D285/26; C07D285/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A MEMBER OF THE GROUP CONSISTING OF 3,4-DIHYDRO2H-1,2,4-BENZOTHIADIAZINE-1,1-DIOXIDES OF THE FORMULA:
Claim 2
Dependent Claim
11 words
A MEMBER OF THE GROUP CONSISTING OF 3,4-DIHYDRO2H-1,2,4-BENZOTHIADIAZINE-1,1-DIOXIDES OF THE FORMULA:
References Cited (Backward Citations)
US3025292A
Cited
US3043840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-29 | 1968-06-29 | 1968-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-29 | 1972-06-29 | 1972-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-29 | 1976-06-29 | 1976-12-29 | $7700.00 | Window Closed / Lapsed |