US3130221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1, 1-dihydroperfluoroethyl-sulfonic acid
Assignee: Pennwalt Corp
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Filing: 1961-02-10
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Granted: 1964-04-21
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Expires: 1981-02-10
Abstract
No abstract record available.
Inventors
- 👤 Robert E Oesterling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:54
CPC Classifications
C; C06; C06B; C06B43/00; C07; C07C; C07C309/00; C07C309/01; C07C309/02; C07C309/03; C07C309/06; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/24; C10L1/2431; C10L1/2437; Y; Y10; Y10S; Y10S149/00; Y10S149/12; Y10S149/121
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |