US2612458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for rendering window surfaces water repellent and product resulting therefrom
Assignee: HONORARY ADVISORY COUNCIL FOR SCIENTIFIC AND INDUSTRIAL RESEARCH
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Filing: 1947-06-18
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Granted: 1952-09-30
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Expires: 1967-06-18
Abstract
No abstract record available.
Inventors
- 👤 Donald F Stedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:00
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31801; Y10T428/31855; Y10T428/31938
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 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 ATOM IN SAID LINKAGE IN ADMIXTURE IN A VOLATILE HYDROCARBON SOLVENT WITH A FINELY DIVIDED, INORGANIC, NON-SILICEOUS ADHESIVEPROMOTING AGENT WHICH WITH RUBBING CHANGES SAID POLY-SILICANE FROM A FORM WHICH IS SOLUBLE IN HYDROCARBON SOLVENT TO ONE WHICH IS INSOLUBLE THEREIN AND SELECTED FROM A GROUP CONSISTING OF CARBON BLACK, ROUGE, BARIUM SULPHATE, LITHIPONE AND THE PRECIPITATED FLUORIDES OF CALCIUM, BARIUM, STRONTIUM AND LITHIUM.
Claim 2
Dependent Claim
111 words
A WINDOW SURFACE HAVING THEREON A COMPOSITE FILM CONSISTING ESSENTIALLY OF ADHERENT 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 ATOM IN SAID LINKAGE, AND ON THE ADHERING POLYSILICANE A NON-POLAR WAX COMPOSITION CONSISTING ESSENTIALLY OF 19 TO 38% BY WEIGHT OF PURIFIED AMORPHOUS MINERAL WAX HAVING A MELTING POINT OF SUBSTANTIALLY 93* C., 49 TO 70% BY WEIGHT OF A PARAFFIN WAX HAVING A MELTING POINT OF AT LEAST 64* C., 3 TO 10% OF POLYISOBUTYLENE AND 3 TO 10% OF POLYETHYLENE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |