US2772860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vessel with continuous helical liner
Assignee: Shell Development Co
•
Filing: 1953-07-28
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Granted: 1956-12-04
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Expires: 1973-07-28
Abstract
No abstract record available.
Inventors
- 👤 George A Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:11
CPC Classifications
B; B65; B65D; B65D85/00; B65D85/70; B65D85/84; B01; B01J; B01J19/00; B01J19/0053; B01J19/006; B01J19/02; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00076; B01J2219/00159; B01J2219/00761; B01J2219/00763; B01J2219/00765; B01J2219/0077; B01J2219/00772; B01J2219/02; B01J2219/0204; B01J2219/0236; Y; Y10; Y10S; Y10S220/00; Y10S220/917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US665349A
Cited
US1160217A
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US1453794A
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DE567443C
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US2158799A
Cited
US2209290A
Cited
US2631015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |