Patent US3000757A successfully refreshed from Google Patents.
US3000757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coating substrates with a vapor permeable polymeric coating
Assignee: EIDP Inc
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Filing: 1957-01-28
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Granted: 1961-09-19
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Expires: 1977-01-28
Abstract
No abstract record available.
Inventors
- 👤 Johnston Robert Alexander
- 👤 Holden Ellsworth Kissam
- 👤 Moltenbrey Ronald Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:07
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/12; D06N3/14; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08J; C08J9/00; C08J9/28; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/564; C08J2201/00; C08J2201/04; C08J2201/054; C08J2201/0542; C08J2201/0544; Y; Y10; Y10S; Y10S264/00; Y10S264/63; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24438; Y10T428/31504; Y10T428/31551; Y10T428/31565; Y10T442/00; Y10T442/20; Y10T442/2033; Y10T442/2139; Y10T442/2148
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS WHICH COMPRISES FORMING A POLYMERIC SOLUTION HAVING AS ESSENTIAL CONSTITUENTS A HYGROSCOPIC SOLVENT AND UP TO 30 PERCENT BY WEIGHT OF A POLYMER FORMED BY CHAIN-EXTENDING THE REACTION PRODUCT OF AT LEAST ON POLYALKYLENEETHER GLYCOL AND AT LEAST ONE DIISOCYANATE WITH AT LEAST ONE COMPOUND HAVING TWO ACTIVE HYDROGEN ATOMS, COATING A SUBSTRATE WITH SAID POLYMERIC SOLUTION, EXPOSING SAID COATED SUBSTRATE TO AN ATMOSPHERE CHARACTERIZED BY HAVING A RELATIVE HUMIDITY OF ABOUT FROM 15 TO 100% AT A DRY BULB TEMPERATURE OF ABOUT FROM 50* TO 100* F. AND REMOVING RESIDUAL HYGROSCOPIC SOLVENT FROM THE RESULTING MICROPOROUS COATING.
Claim 2
Dependent Claim
100 words
A PROCESS WHICH COMPRISES FORMING A POLYMERIC SOLUTION HAVING AS ESSENTIAL CONSTITUENTS A HYGROSCOPIC SOLVENT AND UP TO 30 PERCENT BY WEIGHT OF A POLYMER FORMED BY CHAIN-EXTENDING THE REACTION PRODUCT OF AT LEAST ON POLYALKYLENEETHER GLYCOL AND AT LEAST ONE DIISOCYANATE WITH AT LEAST ONE COMPOUND HAVING TWO ACTIVE HYDROGEN ATOMS, COATING A SUBSTRATE WITH SAID POLYMERIC SOLUTION, EXPOSING SAID COATED SUBSTRATE TO AN ATMOSPHERE CHARACTERIZED BY HAVING A RELATIVE HUMIDITY OF ABOUT FROM 15 TO 100% AT A DRY BULB TEMPERATURE OF ABOUT FROM 50* TO 100* F. AND REMOVING RESIDUAL HYGROSCOPIC SOLVENT FROM THE RESULTING MICROPOROUS COATING.
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) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |