US2809389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic yard cleaning machine
Assignee: Individual
•
Filing: 1955-08-05
•
Granted: 1957-10-15
•
Expires: 1975-08-05
Abstract
No abstract record available.
Inventors
- 👤 Charles E Collins
- 👤 Marguerite E Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:39
CPC Classifications
E; E01; E01H; E01H1/00; E01H1/08; E01H1/0827; E01H1/0836; E01H1/0845; A; A01; A01G; A01G20/00; A01G20/40; A01G20/43; A01G20/47
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US434178A
Cited
US1409910A
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CA508706A
Cited
US773483A
Cited
US1899181A
Cited
GB427647A
Cited
US2519741A
Cited
AT162793B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |