US2955522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air inlet device for ventilating plants
Assignee: HI PRESS AIR CONDITIONING OF A
•
Filing: 1957-11-14
•
Granted: 1960-10-11
•
Expires: 1977-11-14
Abstract
No abstract record available.
Inventors
- 👤 Kristiansen Svend Helge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:57
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/2937; Y10T137/2947; Y10T137/295
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1821688A
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US1950792A
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US2529592A
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US2724320A
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US2745332A
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US2727454A
Cited
US2813474A
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US2790371A
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US2913227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |