Patent US2944690A successfully refreshed from Google Patents.
US2944690A
Expired / Lapsed
US
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Closure for vacuum insulated vessels
Assignee: American Thermos Products Co
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Filing: 1955-10-27
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Granted: 1960-07-12
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Expires: 1975-10-27
Abstract
No abstract record available.
Inventors
- 👤 Louis J Darmstadt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:59
CPC Classifications
A; A47; A47J; A47J41/00; A47J41/0005; A47J41/0011
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2425841A
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US2549404A
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US2685379A
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US2690946A
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US2667986A
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FR1072030A
Cited
FR1082517A
Cited
FR1096476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |