US2967832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyphosphate detergent compositions containing dicyandiamide tarnish inhibitor
Assignee: Wyeth Holdings LLC
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Filing: 1954-11-15
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Granted: 1961-01-10
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Expires: 1974-11-15
Abstract
No abstract record available.
Inventors
- 👤 Charles E Light
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:14
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/26; C11D3/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A DETERGENT COMPOSITION SUITABLE FOR USE IN WASHING COPPER-CONTAINING METALS COMPRISING FROM ABOUT 15 TO 35 PARTS BY WEIGHT OF AN ORGANIC DETERGENT, ABOUT 5 TO 50 PARTS OF AN INORGANIC ALKALI METAL POLYPHOSPHATE NORMALLY CAUSING TARNISHING OF SAID COPPER-CONTAINING METAL AND, AS A TARNISH-INHIBITOR FOR SAID POLYPHOSPHATE, FROM 0.01 TO ABOUT 2 PARTS BY WEIGHT OF DICYANDIAMIDE.
Claim 2
Dependent Claim
58 words
A DETERGENT COMPOSITION SUITABLE FOR USE IN WASHING COPPER-CONTAINING METALS COMPRISING FROM ABOUT 15 TO 35 PARTS BY WEIGHT OF AN ORGANIC DETERGENT, ABOUT 5 TO 50 PARTS OF AN INORGANIC ALKALI METAL POLYPHOSPHATE NORMALLY CAUSING TARNISHING OF SAID COPPER-CONTAINING METAL AND, AS A TARNISH-INHIBITOR FOR SAID POLYPHOSPHATE, FROM 0.01 TO ABOUT 2 PARTS BY WEIGHT OF DICYANDIAMIDE.
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) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |