Patent US2957813A successfully refreshed from Google Patents.
US2957813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of detarnishing silverware
Assignee: General Electric Co
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Filing: 1958-03-31
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Granted: 1960-10-25
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Expires: 1978-03-31
Abstract
No abstract record available.
Inventors
- 👤 Raymond L Reinert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:38
CPC Classifications
C; C25; C25F; C25F1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
215 words
THE METHOD OF DETARNISHING SILVER ARTICLES COMPRISING PLACING SAID ARTICLES IN A CONTAINER HAVING A DRAIN HOLE IN THE BOTTOM THEREOF AND ARRANGED IN A VAT, WHEREIN SAID CONTAINER ALSO COMPRISES AN ANODE ARRANGED IN CONTACT WITH SAID ARTICLES AND FORMED OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND MAGNESIUM, INTRODUCING A CHARGE OF TREATING SOLUTION INTO SAID VAT, SAID TREATING SOLUTION CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF SODIUM TRIPOLYPHOSPHATE, CIRCULATING THROUGHOUT A FIRST PREDETERMINED TIME INTERVAL SAID TREATING SOLUTION FROM SAID VAT INTO SAID CONTAINER AND THEREFROM THROUGH SAID DRAIN HOLE AND BACK INTO SAID VAT, WHEREIN THE RATE OF CIRCULATION OF SAID TREATING SOLUTION INTO SAID CONTAINER IS HIGHER THAN THE RATE OF DRAINAGE OF SAID TREATING SOLUTION FROM SAID CONTAINER SO THAT A BATH OF SAID TREATING SOLUTION IS ACCUMULATED IN SAID CONTAINER DURING SAID FIRST PREDETERMINED TIME INTERVAL IN SUBMERGING AND WETTING RELATION WITH SAID ARTICLES AND SAID ANODE, DRAINING SAID TREATING SOLUTION FROM SAID VAT TO THE EXTERIOR, INTRODUCING A CHARGE OF RINSING WATER INTO SAID VAT, CIRCULATING THROUGHOUT A SECOND PREDETERMINED TIME INTERVAL SAID RINSING WATER FROM SAID VAT INTO SAID CONTAINER AND THEREFROM THROUGH SAID DRAIN HOLE AND BACK INTO SAID VAT, AND THEN DRAINING SAID RINSING WATER FROM SAID VAT TO THE EXTERIOR.
Claim 2
Independent Claim
215 words
THE METHOD OF DETARNISHING SILVER ARTICLES COMPRISING PLACING SAID ARTICLES IN A CONTAINER HAVING A DRAIN HOLE IN THE BOTTOM THEREOF AND ARRANGED IN A VAT, WHEREIN SAID CONTAINER ALSO COMPRISES AN ANODE ARRANGED IN CONTACT WITH SAID ARTICLES AND FORMED OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND MAGNESIUM, INTRODUCING A CHARGE OF TREATING SOLUTION INTO SAID VAT, SAID TREATING SOLUTION CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF SODIUM TRIPOLYPHOSPHATE, CIRCULATING THROUGHOUT A FIRST PREDETERMINED TIME INTERVAL SAID TREATING SOLUTION FROM SAID VAT INTO SAID CONTAINER AND THEREFROM THROUGH SAID DRAIN HOLE AND BACK INTO SAID VAT, WHEREIN THE RATE OF CIRCULATION OF SAID TREATING SOLUTION INTO SAID CONTAINER IS HIGHER THAN THE RATE OF DRAINAGE OF SAID TREATING SOLUTION FROM SAID CONTAINER SO THAT A BATH OF SAID TREATING SOLUTION IS ACCUMULATED IN SAID CONTAINER DURING SAID FIRST PREDETERMINED TIME INTERVAL IN SUBMERGING AND WETTING RELATION WITH SAID ARTICLES AND SAID ANODE, DRAINING SAID TREATING SOLUTION FROM SAID VAT TO THE EXTERIOR, INTRODUCING A CHARGE OF RINSING WATER INTO SAID VAT, CIRCULATING THROUGHOUT A SECOND PREDETERMINED TIME INTERVAL SAID RINSING WATER FROM SAID VAT INTO SAID CONTAINER AND THEREFROM THROUGH SAID DRAIN HOLE AND BACK INTO SAID VAT, AND THEN DRAINING SAID RINSING WATER FROM SAID VAT TO THE EXTERIOR.
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) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |