US3538151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diphenyloxide sulfone sulfonic acids
Assignee: Sandoz AG
•
Filing: 1967-03-03
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Granted: 1970-11-03
•
Expires: 1987-03-03
Abstract
No abstract record available.
Inventors
- 👤 Hans-Peter Baumann
- 👤 Robert-Christian Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:35
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/91; C07C; C07C317/00; C07C317/14; C07C317/16; C07C317/22; C07C323/00; C07C323/64; C07C323/66; C07D333/00; C07D333/50; C07D333/76; D; D06; D06P; D06P1/00; D06P1/44; D06P1/52; D06P1/56; D06P1/62; D06P1/621; D06P1/622; D06P1/625; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/82; D06P3/8204; D06P3/8209; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924; Y10S8/926; Y10S8/927
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3110683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |