US2686630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blower
Assignee: Lau Blower Co
•
Filing: 1950-08-16
•
Granted: 1954-08-17
•
Expires: 1970-08-16
Abstract
No abstract record available.
Inventors
- 👤 John B Burrowes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:40
CPC Classifications
F; F04; F04D; F04D17/00; F04D17/08; F04D17/16; F04D17/162
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US935114A
Cited
US1017215A
Cited
GB191210605A
Cited
US1809603A
Cited
US1752830A
Cited
US2135785A
Cited
US2157609A
Cited
US2375920A
Cited
US2316608A
Cited
US2297049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |