US2777772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for maintaining clear vision in windshields
Assignee: National Research Council Canada
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Filing: 1953-06-22
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Granted: 1957-01-15
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Expires: 1973-06-22
Abstract
No abstract record available.
Inventors
- 👤 Donald F Stedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:29
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; C03; C03C; C03C17/00; C03C17/28; C03C17/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A COMPOSITION FOR RENDERING WINDOW SURFACES WATER AND RAIN REPELLENT COMPRISING ESSENTIALLY SUBSTITUTED POLYSILICANE, CONSISTING ONLY OF CARBON, HYDROGEN AND SILICON AND HAVING NOT LESS THAN ONE SI-SI LINKAGE AND AT LEAST ONE OF A GROUP CONSISTING OF ALKYL AND ARYL RADICALS ATTACHED TO AT LEAST ONE SI ATOMS IN SAID LINKAGE, IN ADMIXTURE WITH CARBON BLACK AND 15 TO 50% OF ITS WEIGHT OF ROUGE HAVING A PARTICLE SIZE LARGER THAN THAT O F THE CARBON BLACK.
Claim 2
Dependent Claim
78 words
A COMPOSITION FOR RENDERING WINDOW SURFACES WATER AND RAIN REPELLENT COMPRISING ESSENTIALLY SUBSTITUTED POLYSILICANE, CONSISTING ONLY OF CARBON, HYDROGEN AND SILICON AND HAVING NOT LESS THAN ONE SI-SI LINKAGE AND AT LEAST ONE OF A GROUP CONSISTING OF ALKYL AND ARYL RADICALS ATTACHED TO AT LEAST ONE SI ATOMS IN SAID LINKAGE, IN ADMIXTURE WITH CARBON BLACK AND 15 TO 50% OF ITS WEIGHT OF ROUGE HAVING A PARTICLE SIZE LARGER THAN THAT O F THE CARBON BLACK.
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) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |