Patent US2909800A successfully refreshed from Google Patents.
US2909800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid and vacuum cleaning machine
Assignee: Individual
•
Filing: 1953-06-22
•
Granted: 1959-10-27
•
Expires: 1973-06-22
Abstract
No abstract record available.
Inventors
- 👤 Eugene L Grindle
- 👤 Edward G Pickels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:26
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4075; A47L11/34; A47L11/408; A47L11/4088; Y; Y10; Y10S; Y10S55/00; Y10S55/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE72822C
Cited
US742880A
Cited
US813282A
Cited
US1363860A
Cited
US1898038A
Cited
US1661480A
Cited
US1633796A
Cited
US1691164A
Cited
US1950732A
Cited
US2061517A
Cited
US2292435A
Cited
US2293115A
Cited
US2319604A
Cited
FR996780A
Cited
US2700473A
Cited
GB652169A
Cited
US2713826A
Cited
US2688376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-26 | 1963-04-27 | 1963-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-26 | 1967-04-27 | 1967-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-26 | 1971-04-27 | 1971-10-27 | $7700.00 | Window Closed / Lapsed |