US3540229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cooling apparatus
Assignee: REPCO PRODUCTS CORP
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Filing: 1969-01-24
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Granted: 1970-11-17
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Expires: 1989-01-24
Abstract
No abstract record available.
Inventors
- 👤 Paul H Bunten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:03
CPC Classifications
F; F24; F24F; F24F1/00; F24F1/02; F24F1/022; B; B63; B63J; B63J2/00; B63J2/02; B63J2/04; F24F5/00; F24F5/0007; F25; F25B; F25B2339/00; F25B2339/04; F25B2339/047
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) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |