Patent US3582423A successfully refreshed from Google Patents.
US3582423A
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US
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Process for coating porous substrates
Assignee: Wilmington Chemical Corp
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Filing: 1966-12-19
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Granted: 1971-06-01
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Expires: 1986-12-19
Abstract
Abstract COATING PLIABLE POROUS SUBSTRATES LIKE FOAMS AND TEXTILES WITH TOUGH PLIABLE PROTECTIVE LAYERS PREPARED FROM LINEAR 700 TO 500 MOLECULAR WEIGHT HYDROPHOBIC DIALCOHOLS HAVING AN ALCOHOL GROUP AT EACH END OF THE MOLECULE WHICH DIALCOHOL IS REACTED WITH DIISOCYANATE TO ATTACH FREE DIISOCYANATE-CARRYING GROUPS AT EACH END, AND THEN REACTING THE RESULTANT MATERIAL WITH SLIGHT EXCESS OF P,P''-METHYLENE DIANILINE.
Inventors
- 👤 Tsu Huai Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:04
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; B; B32; B32B; B32B29/00; B32B29/002; B32B29/007; B32B37/00; B32B37/06; B32B37/10; B32B5/00; B32B5/18; B32B7/00; B32B7/04; B32B7/06; C08J; C08J9/00; C08J9/36; C08J9/365; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/564; B32B2255/00; B32B2255/12; B32B2255/26; B32B2309/00; B32B2309/02; B32B2309/025; Y; Y10; Y10S; Y10S528/00; Y10S528/904; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/249991; Y10T428/31504; Y10T428/31551; Y10T428/31554
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |