US3397662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hatch arrangement for liquefied gas storage tanks
Assignee: Individual
•
Filing: 1966-06-28
•
Granted: 1968-08-20
•
Expires: 1986-06-28
Abstract
No abstract record available.
Inventors
- 👤 Norman K Basile
- 👤 Thomas F Bridges
- 👤 Jr George R Knight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:08
CPC Classifications
B; B63; B63B; B63B19/00; B63B19/12; B63B19/26; B63B25/00; B63B25/02; B63B25/08; B63B25/12; B63B25/16; F; F17; F17C; F17C13/00; F17C13/06; F17C2203/00; F17C2203/03; F17C2203/0304; F17C2203/0358; F17C2270/00; F17C2270/01; F17C2270/0102; F17C2270/0105; F17C2270/0107; Y; Y10; Y10S; Y10S220/00; Y10S220/901; Y10S220/918
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) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |