Patent US4790850A successfully refreshed from Google Patents.
US2129933A
Expired / Lapsed
US
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Mounting for air circulator devices
Assignee: AIRMASTER Corp
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Filing: 1936-11-13
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Granted: 1938-09-13
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Expires: 1956-11-13
Abstract
No abstract record available.
Inventors
- 👤 Herman C Hueglin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:44
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/60; F04D29/64; F04D29/644; F04D29/646; Y; Y10; Y10S; Y10S416/00; Y10S416/50; Y10T; Y10T403/00; Y10T403/45; Y10T403/455; Y10T403/457; Y10T403/458; Y10T403/70; Y10T403/7047; Y10T403/7061
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-09-12 | 1942-03-14 | 1942-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-09-12 | 1946-03-14 | 1946-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-09-12 | 1950-03-14 | 1950-09-13 | $7700.00 | Window Closed / Lapsed |