Patent US2930721A successfully refreshed from Google Patents.
US2930721A
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Dishwashing method
Assignee: Individual
•
Filing: 1955-07-26
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Granted: 1960-03-29
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Expires: 1975-07-26
Abstract
No abstract record available.
Inventors
- 👤 John B Tuthill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:26
CPC Classifications
A; A47; A47L; A47L15/00; A47L15/42; A47L15/44; A47L15/0018; A47L15/0021; A47L15/0036; A47L15/0055; A47L15/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A METHOD OF CLEANING AND STERILIZING SOILED DISHES WHICH COMPRISES INTERPOSING SAID DISHES TO BE CLEANED AND STERILIZED WITHIN THE NORMALLY CLOSED CIRCUIT OF A WATERRECIRCULATION SYSTEM? GRAVITATIONALLY DIRECTING A DETERGENT INTO SAID SYSTEM FOR ADMIXTURE AND CIRCULATION WITH THE WATER? OPENING SAID CIRCUIT AFTER A PREDETERMINED PERIOD OF TIME TO DRAIN THE WATER-DETERGENT ADMIXTURE THEREFROM? INTRODCING A PREDETERMINED AMOUNT OF RINSE WATER INTO SAID SYSTEM AFTER DRAINING FOR A PREDETERMINED PERIOD OF TIME WHILE THE SYSTEM CONTINUES TO OPERATE AND WHILE THE CIRCUIT IS OPEN WHEREBY TO REMOVE THE ADMIXTURE FROM THE DISHES AND FLUSH THE SAME FROM THE SYSTEM? RECLOSING THE CIRCUIT AFTER A PREDETERMINED PERIOD OF TIME? GRAVITATIONALLY DIRECTING A PREDETERMINED QUANTITY OF STERILIZER INTO SAID SYSTEM WHILE CONTINUING TO INTRODUCE RINSE WATER? DISCONTINUING INTRODUCTION TO RINSE WATER? AND DISCONTINUING THE RECIRCULATION OF THE WATER-STERILIZER ADMIXTURE AFTER A PREDETERMINED PERIOD OF TIME FOLLOWING COMPLETION OF THE RINSE WATER INTRODUCTION.
Claim 2
Independent Claim
152 words
A METHOD OF CLEANING AND STERILIZING SOILED DISHES WHICH COMPRISES INTERPOSING SAID DISHES TO BE CLEANED AND STERILIZED WITHIN THE NORMALLY CLOSED CIRCUIT OF A WATERRECIRCULATION SYSTEM? GRAVITATIONALLY DIRECTING A DETERGENT INTO SAID SYSTEM FOR ADMIXTURE AND CIRCULATION WITH THE WATER? OPENING SAID CIRCUIT AFTER A PREDETERMINED PERIOD OF TIME TO DRAIN THE WATER-DETERGENT ADMIXTURE THEREFROM? INTRODCING A PREDETERMINED AMOUNT OF RINSE WATER INTO SAID SYSTEM AFTER DRAINING FOR A PREDETERMINED PERIOD OF TIME WHILE THE SYSTEM CONTINUES TO OPERATE AND WHILE THE CIRCUIT IS OPEN WHEREBY TO REMOVE THE ADMIXTURE FROM THE DISHES AND FLUSH THE SAME FROM THE SYSTEM? RECLOSING THE CIRCUIT AFTER A PREDETERMINED PERIOD OF TIME? GRAVITATIONALLY DIRECTING A PREDETERMINED QUANTITY OF STERILIZER INTO SAID SYSTEM WHILE CONTINUING TO INTRODUCE RINSE WATER? DISCONTINUING INTRODUCTION TO RINSE WATER? AND DISCONTINUING THE RECIRCULATION OF THE WATER-STERILIZER ADMIXTURE AFTER A PREDETERMINED PERIOD OF TIME FOLLOWING COMPLETION OF THE RINSE WATER INTRODUCTION.
References Cited (Backward Citations)
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US2718481A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |