US3427817A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for producing cold and/or liquefying gases
Assignee: Philips North America LLC
•
Filing: 1965-12-02
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Granted: 1969-02-18
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Expires: 1985-12-02
Abstract
No abstract record available.
Inventors
- 👤 Johan Adriaan Rietdijk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:34
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/02; F25J1/0243; F25J1/0257; F25J1/0275; F25J1/0276; F25B; F25B9/00; F25B9/14; F25J1/003; F25J1/0047; F25J1/0052; F25J1/006; F25J1/0062; F25J1/0065; F25B2341/00; F25B2341/001; F25B2341/0011; F25B2341/0012; F25B2341/0013; F25B2341/0015; F25J2240/00; F25J2240/60; F25J2270/00; F25J2270/90; F25J2270/912
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |