US2829109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nontarnishing detergent compositions containing a hydrazine salt
Assignee: Lever Brothers Co
•
Filing: 1955-08-18
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Granted: 1958-04-01
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Expires: 1975-08-18
Abstract
No abstract record available.
Inventors
- 👤 Edgar E Ruff
- 👤 Elwin E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:55
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/046; C11D3/0005; C11D3/0073; C11D3/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
45 words
A DETERGENT COMPOSITION COMPRISING AN ALKALI METAL POLYPHOSPHATE WHICH IN AQUEOUS SOLUTION TARNISHES COPPER AND COPPER AND NICKEL ALLOYS AND A WATER-SOLUBLE INORGANIC HYDRAZINE SALT IN AN AMOUNT OF AT LEAST ABOUT 1% BASED ON THE WEIGHT OF POLYPHOSPHATE AND SUFFICIENT TO INHIBIT SUCH TARNISHING.
Claim 2
Dependent Claim
45 words
A DETERGENT COMPOSITION COMPRISING AN ALKALI METAL POLYPHOSPHATE WHICH IN AQUEOUS SOLUTION TARNISHES COPPER AND COPPER AND NICKEL ALLOYS AND A WATER-SOLUBLE INORGANIC HYDRAZINE SALT IN AN AMOUNT OF AT LEAST ABOUT 1% BASED ON THE WEIGHT OF POLYPHOSPHATE AND SUFFICIENT TO INHIBIT SUCH TARNISHING.
Claim 3
Dependent Claim
63 words
A DETERGENT COMPOSITION COMPRISING FROM ABOUT 5% TO ABOUT 50% OF AN ALKALI METAL POLYPHOSPHATE WHICH IN AQUEOUS SOLUTION TARNISHES COPPER AND COPPER AND NICKEL ALLOYS, FROM ABOUT 5% TO ABOUT 40% OF AN ORGANIC NONSOAP DETERGENT, AND A WATER-SOLUBLE INORGANIC HYDRAZINE SALT IN AN AMOUNT OF AT LEAST ABOUT 1% BASED ON THE WEIGHT OF POLYPHOSPHATE AND SUFFICIENT TO INHIBIT SUCH TARNISHING.
Claim 4
Dependent Claim
63 words
A DETERGENT COMPOSITION COMPRISING FROM ABOUT 5% TO ABOUT 50% OF AN ALKALI METAL POLYPHOSPHATE WHICH IN AQUEOUS SOLUTION TARNISHES COPPER AND COPPER AND NICKEL ALLOYS, FROM ABOUT 5% TO ABOUT 40% OF AN ORGANIC NONSOAP DETERGENT, AND A WATER-SOLUBLE INORGANIC HYDRAZINE SALT IN AN AMOUNT OF AT LEAST ABOUT 1% BASED ON THE WEIGHT OF POLYPHOSPHATE AND SUFFICIENT TO INHIBIT SUCH TARNISHING.
References Cited (Backward Citations)
US2731420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |