US3548607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid nitrogen transfer system using the leidenfrost principle
Assignee: US Philips Corp
•
Filing: 1969-05-26
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Granted: 1970-12-22
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Expires: 1989-05-26
Abstract
No abstract record available.
Inventors
- 👤 Donald M Pillsbury Jr
- 👤 Russell E Hadley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:09
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/14; F16L59/141; F17; F17C; F17C6/00; F17C2203/00; F17C2203/03; F17C2203/06; F17C2203/0634; F17C2203/0636; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0352; F17C2205/0358; F17C2221/00; F17C2221/01; F17C2221/014; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2265/00; F17C2265/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |