Patent US1920578A successfully refreshed from Google Patents.
Patent US3303048A successfully refreshed from Google Patents.
US3303048A
Expired / Lapsed
US
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Treatment of porous and fibrous material to impart water repellency thereto
Assignee: Midland Silicones Ltd
•
Filing: 1963-12-11
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Granted: 1967-02-07
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Expires: 1983-12-11
Abstract
No abstract record available.
Inventors
- 👤 Kenneth G Cooper
- 👤 Hedley S B Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:28
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/643; D06M15/6436; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2221; Y10T442/223
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
IN A METHOD FOR RENDERING MATERIALS WATER REPELLENT THE IMPROVEMENT COMPRISING APPLYING THERETO THE REACTION PRODUCT OF: (A) AN AMINOALKYL SUBSTITUTED ORGANOPOLYSILOXANE CONTAINING IN EACH MOLECULE AT LEAST ONE
Claim 2
Dependent Claim
29 words
IN A METHOD FOR RENDERING MATERIALS WATER REPELLENT THE IMPROVEMENT COMPRISING APPLYING THERETO THE REACTION PRODUCT OF: (A) AN AMINOALKYL SUBSTITUTED ORGANOPOLYSILOXANE CONTAINING IN EACH MOLECULE AT LEAST ONE
References Cited (Backward Citations)
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Cited
US2762823A
Cited
US2832754A
Cited
US2823195A
Cited
US2972598A
Cited
US3085908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |