US3208621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated tank for liquids boiling below ambient temperatures
Assignee: North American Aviation Corp
•
Filing: 1963-08-16
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Granted: 1965-09-28
•
Expires: 1983-08-16
Abstract
No abstract record available.
Inventors
- 👤 John H Dawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:15
CPC Classifications
F; F17; F17C; F17C13/00; F17C13/001; F17C2203/00; F17C2203/03; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; Y; Y10; Y10S; Y10S220/00; Y10S220/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US464694A
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US1052245A
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US1570839A
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US2103076A
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CH181971A
Cited
US2859895A
Cited
US2958442A
Cited
US3019937A
Cited
US2947438A
Cited
US2937780A
Cited
US3018018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |