US3447339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold producing systems
Assignee: US Philips Corp
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Filing: 1967-05-12
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Granted: 1969-06-03
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Expires: 1987-05-12
Abstract
No abstract record available.
Inventors
- 👤 Johan Adriaan Rietdijk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:05
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/02; F25J1/0243; F25J1/0257; F25J1/0275; F25J1/0276; F25B; F25B1/00; F25B1/10; F25B9/00; F25B9/10; F25J1/003; F25J1/0047; F25J1/0052; F25J1/006; F25J1/0062; F25J1/0065; F25B2341/00; F25B2341/001; F25B2341/0011; F25B2341/0012; F25B2341/0015; 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) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |