US3446385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filament wound reinforced pressure vessel
Assignee: Koppers Co Inc
•
Filing: 1966-08-05
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Granted: 1969-05-27
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Expires: 1986-08-05
Abstract
No abstract record available.
Inventors
- 👤 Warren E Ponemon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:35
CPC Classifications
F; F17; F17C; F17C1/00; F17C1/16; F17C1/14; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2201/03; F17C2201/035; F17C2201/05; F17C2201/056; F17C2201/058; F17C2203/00; F17C2203/06; F17C2203/0602; F17C2203/0612; F17C2203/0614; F17C2203/0624; F17C2203/0634; F17C2203/0636; F17C2203/0639; F17C2203/0646; F17C2203/0648; F17C2203/0658; F17C2203/0663; F17C2203/0673; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0311; F17C2209/00; F17C2209/21; F17C2209/2154; F17C2209/2163; F17C2209/23; F17C2209/232; F17C2223/00; F17C2223/03; F17C2223/035; F17C2223/036; F17C2260/00; F17C2260/01; F17C2260/011; F17C2260/012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1651521A
Cited
US2507778A
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US2614058A
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US2568848A
Cited
US2809762A
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US2827195A
Cited
US2848133A
Cited
US2988240A
Cited
US3132761A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |