Patent US2830779A successfully refreshed from Google Patents.
US2830779A
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Assignee: Lau Blower Co
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Filing: 1955-02-21
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Granted: 1958-04-15
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Expires: 1975-02-21
Abstract
No abstract record available.
Inventors
- 👤 William H Wentling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:10
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/60; F04D29/601; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1879211A
Cited
US2062520A
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US2388056A
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US2521920A
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US2658777A
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US2795388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |