US2637487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blower
Assignee: Individual
•
Filing: 1948-03-09
•
Granted: 1953-05-05
•
Expires: 1968-03-09
Abstract
No abstract record available.
Inventors
- 👤 James G Sawyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:29
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/66; F04D29/68; F04D29/681; F04D29/682; F04D29/684; Y; Y10; Y10S; Y10S415/00; Y10S415/914
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1635840A
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US1778340A
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US1862827A
Cited
US2136403A
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US2186823A
Cited
US2320733A
Cited
US2135837A
Cited
US2405768A
Cited
US2344835A
Cited
US2555576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |