Patent US2544813A successfully refreshed from Google Patents.
US2544813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blower
Assignee: Individual
•
Filing: 1947-12-09
•
Granted: 1951-03-13
•
Expires: 1967-12-09
Abstract
No abstract record available.
Inventors
- 👤 James L Wall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:26
CPC Classifications
F; F04; F04D; F04D17/00; F04D17/08; F04D17/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1682258A
Cited
US718557A
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US1131555A
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US1556657A
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US1657055A
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US1857965A
Cited
US2003666A
Cited
US2181592A
Cited
US2233825A
Cited
US2338010A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |