Patent US2684999A successfully refreshed from Google Patents.
US3149000A
Expired / Lapsed
US
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Hydrophilic polyurethane sponge
Assignee: Simoniz Co
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Filing: 1961-12-15
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Granted: 1964-09-15
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Expires: 1981-12-15
Abstract
No abstract record available.
Inventors
- 👤 Sotirios S Beicos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:09
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J9/40; C08J9/42; C08J2375/00; C08J2375/04; C08J2429/00; Y; Y10; Y10S; Y10S521/00; Y10S521/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A HYDROPHILIC POLYURETHANE PRODUCT COMPRISING: A CELLULAR POLYURETHANE PLASTIC PRODUCED B A PROCESS WHICH COMPRISES REACTING IN THE PRESENCE OF A BLOWING AGENT AN ORGANIC POLYISOCYANATE WITH AN ORGANIC COMPOUND HAVING A PLURALITY OF HYDROXYL GROUPS REACTIVE WITH AN -NCO GROUP; AND POLYACROLEIN ADDED TO SAID CELLULAR PLASTIC AFTER THE FORMATION THEREOF, AS A POLYACROLEIN-SULFUROUS ACID REACTION PRODUCT.
Claim 2
Dependent Claim
58 words
A HYDROPHILIC POLYURETHANE PRODUCT COMPRISING: A CELLULAR POLYURETHANE PLASTIC PRODUCED B A PROCESS WHICH COMPRISES REACTING IN THE PRESENCE OF A BLOWING AGENT AN ORGANIC POLYISOCYANATE WITH AN ORGANIC COMPOUND HAVING A PLURALITY OF HYDROXYL GROUPS REACTIVE WITH AN -NCO GROUP; AND POLYACROLEIN ADDED TO SAID CELLULAR PLASTIC AFTER THE FORMATION THEREOF, AS A POLYACROLEIN-SULFUROUS ACID REACTION PRODUCT.
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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |