Patent US3989633A successfully refreshed from Google Patents.
US3989633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Windshield washer fluids containing from 10-1000 ppm of acrylamide polymer to reduce wear of wiper blades and reduce windage losses of fluid
Assignee: ChampionX LLC
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Filing: 1975-06-11
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Granted: 1976-11-02
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Expires: 1995-06-11
Abstract
Abstract Windshield washer fluids of the type comprising a major portion of water, one or more water-soluble alcohols which are predominantly monohydric alcohols capable of depressing the freezing point of water and a surfactant can be improved in their operational efficiency by adding thereto from between 10-1,000 ppm of an acrylamide polymer having a molecular weight of at least 10,000.
Inventors
- 👤 Alvin J. Frisque
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:19
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3769; C11D3/3773; B; B60; B60S; B60S1/00; B60S1/02; B60S1/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A process for cleaning a windshield and for treating rubber windshield wiper blades comprising applying to said windshield a windshield washer fluid containing a major proportion of water, one or more water-soluble alcohols which are predominantly monohydric alcohols capable of depressing the freezing point of water, a surfactant, and from 10-1000 ppm of acrylamide polymer with molecular weight at least 10,000, said acrylamide polymer preventing excessive wear of said rubber windshield wiper blades and reducing windage losses of said windshield wiper fluid.
Claim 2
Dependent Claim
82 words
A process for cleaning a windshield and for treating rubber windshield wiper blades comprising applying to said windshield a windshield washer fluid containing a major proportion of water, one or more water-soluble alcohols which are predominantly monohydric alcohols capable of depressing the freezing point of water, a surfactant, and from 10-1000 ppm of acrylamide polymer with molecular weight at least 10,000, said acrylamide polymer preventing excessive wear of said rubber windshield wiper blades and reducing windage losses of said windshield wiper fluid.
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) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |