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US3016364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane plastics
Assignee: Bayer AG
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Filing: 1957-08-01
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Granted: 1962-01-09
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Expires: 1977-08-01
Abstract
No abstract record available.
Inventors
- 👤 Muller Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:34
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/6505; C08G18/6511; C08G18/08; C08G18/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A METHOD FOR MAKING AN ELASTOMIC SUBSTANTIALLY NON-POROUS POLYURETHANE WHICH COMPRISES REACTING A MEMBER SELECTED FROM THE GROUP CONSISTING OF A POLYESTER PREPARED BY ESTERIFICATION OF A DICARBOXYLIC ACID AND A SATUREATED GLYCOL, A POLY(ALKYLENE ETHER) GLYCOL, A POLYTHIOETHER GLYCOL HAVING O AND S ETHER LINKS IN THE CHAIN THEREOF, AND A POLYACETAL PREPARED FROM A GLYCOL AND FORMALDEHYDE, SAID GROUP MEMBER HAVING AN HYDROXYL NUMBER OF FROM ABOUT 20 TO ABOUT 80, A MOLECULAR WEIGHT OF AT LEAST ABOUT 1000 AND AN ACID NUMBER NOT SUBSTANTIALLY GREATER THAN ABOUT 1,5, P-PHENYLENE DI-(B-HYDROXY ETHYLETHER) IN THE RATIO OF FROM ABOUT 0.4 MOL TO ABOUT 4 MOLS PER MOL OF SAID GROUP MEMBER , AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF 4,4''-DIPHENYL DIMETHYL METHANE DIISOCYANATE AND 4,4''-DIPHENYL METHANE DIISOCYANATE IN AN AMOUNT IN EXCESS OF AT LEAST ABOUT 2 MOLS THEREOF PER MOL OF SAID FIRST MENTIONED GROUP MEMBER.
Claim 2
Independent Claim
150 words
A METHOD FOR MAKING AN ELASTOMIC SUBSTANTIALLY NON-POROUS POLYURETHANE WHICH COMPRISES REACTING A MEMBER SELECTED FROM THE GROUP CONSISTING OF A POLYESTER PREPARED BY ESTERIFICATION OF A DICARBOXYLIC ACID AND A SATUREATED GLYCOL, A POLY(ALKYLENE ETHER) GLYCOL, A POLYTHIOETHER GLYCOL HAVING O AND S ETHER LINKS IN THE CHAIN THEREOF, AND A POLYACETAL PREPARED FROM A GLYCOL AND FORMALDEHYDE, SAID GROUP MEMBER HAVING AN HYDROXYL NUMBER OF FROM ABOUT 20 TO ABOUT 80, A MOLECULAR WEIGHT OF AT LEAST ABOUT 1000 AND AN ACID NUMBER NOT SUBSTANTIALLY GREATER THAN ABOUT 1,5, P-PHENYLENE DI-(B-HYDROXY ETHYLETHER) IN THE RATIO OF FROM ABOUT 0.4 MOL TO ABOUT 4 MOLS PER MOL OF SAID GROUP MEMBER , AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF 4,4''-DIPHENYL DIMETHYL METHANE DIISOCYANATE AND 4,4''-DIPHENYL METHANE DIISOCYANATE IN AN AMOUNT IN EXCESS OF AT LEAST ABOUT 2 MOLS THEREOF PER MOL OF SAID FIRST MENTIONED GROUP MEMBER.
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) | 1965-01-08 | 1965-07-10 | 1966-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-08 | 1969-07-10 | 1970-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-08 | 1973-07-10 | 1974-01-09 | $7700.00 | Window Closed / Lapsed |