Patent US3449440A successfully refreshed from Google Patents.
US3449440A
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Polyalkylene sulfides,sulfoxides and sulfones
Assignee: Chevron USA Inc
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Filing: 1965-06-03
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Granted: 1969-06-10
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Expires: 1985-06-03
Abstract
No abstract record available.
Inventors
- 👤 Donald J Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:10
CPC Classifications
C; C10; C10M; C10M135/00; C10M135/20; C10M135/22; C07; C07C; C07C317/00; C07C317/16; C07C317/18; C07C317/26; C07C317/28; C08; C08F; C08F8/00; C08F8/06; C08F8/18; C08F8/20; C08F8/22; C08F8/34; C10M135/08; C10M2203/00; C10M2203/06; C10M2203/10; C10M2203/102; C10M2203/104; C10M2203/106; C10M2203/108; C10M2205/00; C10M2205/02; C10M2205/022; C10M2205/024; C10M2205/026; C10M2205/028; C10M2205/14; C10M2207/00; C10M2207/04; C10M2209/00; C10M2209/02; C10M2209/10; C10M2209/103; C10M2219/00; C10M2219/04; C10M2219/08; C10M2219/082; C10M2221/00; C10M2221/04; C10M2221/041; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/045; C10M2227/00; C10M2227/02; C10N; C10N2010/00; C10N2010/04; C10N2070/00; C10N2070/02
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) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |