US3415077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for continuously supplying refrigeration below 4.2deg k.
Assignee: Koch Process Systems Inc
•
Filing: 1967-01-31
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Granted: 1968-12-10
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Expires: 1987-01-31
Abstract
No abstract record available.
Inventors
- 👤 Samuel C Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:37
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/04; F25; F25B; F25B9/00; F25B9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3021683A
Cited
US3195322A
Cited
US3162716A
Cited
US3125863A
Cited
US3269137A
Cited
US3313117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |