Patent US2720771A successfully refreshed from Google Patents.
US2720771A
Expired / Lapsed
US
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Liquid circulating means for washing machines and the like
Assignee: Individual
•
Filing: 1953-01-28
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Granted: 1955-10-18
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Expires: 1973-01-28
Abstract
No abstract record available.
Inventors
- 👤 Kermit W Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:49
CPC Classifications
A; A47; A47L; A47L15/00; A47L15/02; A47L15/06; D; D06; D06F; D06F17/00; D06F39/00; D06F39/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE20424E
Cited
US764613A
Cited
US1422547A
Cited
US1382117A
Cited
US1902165A
Cited
US2250315A
Cited
US2336127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |