Patent US3497884A successfully refreshed from Google Patents.
US3497884A
Expired / Lapsed
US
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Automatic water level control
Assignee: Whirlpool Corp
•
Filing: 1968-02-06
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Granted: 1970-03-03
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Expires: 1988-02-06
Abstract
No abstract record available.
Inventors
- 👤 Oscar A W Tichy
- 👤 John A Lauck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:52
CPC Classifications
D; D06; D06F; D06F39/00; D06F39/08; D06F39/087; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/729
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3359766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |