US3353553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dishwashing apparatus
Assignee: Whirlpool Corp
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Filing: 1965-09-17
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Granted: 1967-11-21
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Expires: 1985-09-17
Abstract
No abstract record available.
Inventors
- 👤 Wallace E Lind
- 👤 Jack F Clearman
- 👤 Ival G Dutcher
- 👤 Robert E Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:15
CPC Classifications
A; A47; A47L; A47L15/00; A47L15/42; A47L15/4214; A47L15/4225; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/85978; Y10T137/86131; Y10T137/86163
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
DISHWASHING APPARATUS, COMPRISING: MEANS FORMING A LIQUID RESEPTACLE; DRAIN MEANS FOR REMOVING LIQUID FROM SAID RECEPTACLE; ROTATABLE MEANS; FIRST PUMP MEANS OPERABLE BY SAID ROTATABLE MEANS FOR CIRCULATING LIQUID IN SAID RECEPTACLE; SECOND PUMP MEANS OPERABLE BY SAID ROTATABLE MEANS FOR EXPELLING LIQUID THROUGH SAID DRAIN MEANS, SAID SECOND PUMP MEANS INCLUDING A PUMP CHAMBER HAVING AN INLET FROM SAID RECEPTACLE, AN OUTLET TO SAID DRAIN MEANS AND A ROTATABLE IMPELLER IN SAID CHAMBER; AND MEANS FOR SELECTIVELY INTRODUCING GASEOUS FLUID TO SAID PUMP CHAMBER DURING ROTATION OF SAID IMPELLER TO DISPLACE LEQUID IN SAID CHAMBER AND PREVENT LIQUID FLOW THROUGH SAID SECOND PUMP CHAMBER.
Claim 2
Dependent Claim
105 words
DISHWASHING APPARATUS, COMPRISING: MEANS FORMING A LIQUID RESEPTACLE; DRAIN MEANS FOR REMOVING LIQUID FROM SAID RECEPTACLE; ROTATABLE MEANS; FIRST PUMP MEANS OPERABLE BY SAID ROTATABLE MEANS FOR CIRCULATING LIQUID IN SAID RECEPTACLE; SECOND PUMP MEANS OPERABLE BY SAID ROTATABLE MEANS FOR EXPELLING LIQUID THROUGH SAID DRAIN MEANS, SAID SECOND PUMP MEANS INCLUDING A PUMP CHAMBER HAVING AN INLET FROM SAID RECEPTACLE, AN OUTLET TO SAID DRAIN MEANS AND A ROTATABLE IMPELLER IN SAID CHAMBER; AND MEANS FOR SELECTIVELY INTRODUCING GASEOUS FLUID TO SAID PUMP CHAMBER DURING ROTATION OF SAID IMPELLER TO DISPLACE LEQUID IN SAID CHAMBER AND PREVENT LIQUID FLOW THROUGH SAID SECOND PUMP CHAMBER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |