US3429444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cone filter for an automatic washer
Assignee: Whirlpool Corp
•
Filing: 1966-10-31
•
Granted: 1969-02-25
•
Expires: 1986-10-31
Abstract
No abstract record available.
Inventors
- 👤 Raymond W Spiegel
- 👤 William F Robandt
- 👤 Clark I Platt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:56
CPC Classifications
D; D06; D06F; D06F39/00; D06F39/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US557075A
Cited
US893070A
Cited
US2680684A
Cited
US3217884A
Cited
US3179116A
Cited
US3322282A
Cited
US3282427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |