US3416693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration shielded dewar vessel
Assignee: Cryogenic Engineering Co
•
Filing: 1966-12-07
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Granted: 1968-12-17
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Expires: 1986-12-07
Abstract
No abstract record available.
Inventors
- 👤 George D Covington
- 👤 Haan James R De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:37
CPC Classifications
F; F17; F17C; F17C3/00; F17C3/02; F17C3/08; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0119; F17C2203/00; F17C2203/01; F17C2203/014; F17C2203/03; F17C2203/0304; F17C2203/0308; F17C2203/0316; F17C2203/032; F17C2203/0345; F17C2203/0391; F17C2203/06; F17C2203/0602; F17C2203/0612; F17C2203/0626; F17C2203/0629; F17C2203/0634; F17C2203/0636; F17C2203/0639; F17C2203/0643; F17C2221/00; F17C2221/01; F17C2221/012; F17C2221/014; F17C2221/016; F17C2221/017; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2260/00; F17C2260/03; F17C2260/031; F17C2260/033; F17C2265/00; F17C2265/03; F17C2265/031; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US673073A
Cited
US1521148A
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US2453946A
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US2547607A
Cited
US2776776A
Cited
US3009601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |