US3523456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level indicator for a dispenser
Assignee: Whirlpool Corp
•
Filing: 1968-05-28
•
Granted: 1970-08-11
•
Expires: 1988-05-28
Abstract
No abstract record available.
Inventors
- 👤 David A Matzen
- 👤 John D Siebler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:50
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/28; G01F23/284; G01F23/292; G01F23/30; G01F23/56; G01F23/60; G01F23/606
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1461722A
Cited
US1893198A
Cited
US2194625A
Cited
US2616941A
Cited
US3286508A
Cited
US3371535A
Cited
US3384885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |