US3166121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Space heat exchange unit
Assignee: Svenska Flaktfabriken AB
•
Filing: 1962-02-08
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Granted: 1965-01-19
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Expires: 1982-02-08
Abstract
No abstract record available.
Inventors
- 👤 Boysen Arne
- 👤 Larkfeldt Birger
- 👤 Steinholtz Gosta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:57
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/12; F; F24; F24F; F24F11/00; F24F11/70; F24F11/80; F24F11/83; F24F11/84
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) | 1968-01-19 | 1968-07-20 | 1969-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-19 | 1972-07-20 | 1973-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-19 | 1976-07-20 | 1977-01-19 | $7700.00 | Window Closed / Lapsed |