Patent US2932170A successfully refreshed from Google Patents.
US2932170A
Expired / Lapsed
US
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Refrigerated underground storage system
Assignee: Individual
•
Filing: 1954-03-24
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Granted: 1960-04-12
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Expires: 1974-03-24
Abstract
No abstract record available.
Inventors
- 👤 Patterson Morton Kingsley
- 👤 Robert L Loofbourow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:51
CPC Classifications
E; E21; E21D; E21D1/00; E21D1/10; E21D1/12; B; B65; B65G; B65G5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US711012A
Cited
DE322136C
Cited
US1342781A
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US1938205A
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US2550886A
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US2645093A
Cited
US2659209A
Cited
US2796739A
Cited
US2713775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-12 | 1963-10-12 | 1964-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-12 | 1967-10-12 | 1968-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-12 | 1971-10-12 | 1972-04-12 | $7700.00 | Window Closed / Lapsed |