US3061556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of cellular polyurethane plastics
Assignee: Bayer Corp
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Filing: 1959-08-20
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Granted: 1962-10-30
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Expires: 1979-08-20
Abstract
No abstract record available.
Inventors
- 👤 Paul G Gemeinhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:32
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J2375/00; C08J2375/04; C08J2375/08; C08J2483/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN THE MANUFACTURE OF CELLULAR POLYURETHANE PLASTICS BY A PROCESS WHICH COMPRISES REACTING WATER WITH AN ORGANIC POLYISOCYANATE-MODIFIED POLYHYDIC POLYALKYLENE ETHER CONTAINING TERMINAL-NCO GROUPS, SAID POLYHYDRIC POLYLKYLENE ETHER HAVING FROM 2 TO 4 HYDROXYL GROUPS, THE IMPROVEMENT WHICH COMPRISES MIXING SAID WATER AND SAID POLYISOCYANATE-MODIFIED POLYHDRIC POLYALKYLENE ETHER WITH FROM ABOUT 0.1 TO ABOUT 5 PARTS BY WEIGHT OF A POLY DI(LOWER ALKYL) SILOXANE PREPARED FROM REACTANTS CONTAINING A DIHALO DIALKYL SILANE AND FROM ABOUT 0.5 MOL PERCENT TO ABOUT 15 MOL PERCENT TRIHALO LOWER ALKYL SILANE.
Claim 2
Dependent Claim
87 words
IN THE MANUFACTURE OF CELLULAR POLYURETHANE PLASTICS BY A PROCESS WHICH COMPRISES REACTING WATER WITH AN ORGANIC POLYISOCYANATE-MODIFIED POLYHYDIC POLYALKYLENE ETHER CONTAINING TERMINAL-NCO GROUPS, SAID POLYHYDRIC POLYLKYLENE ETHER HAVING FROM 2 TO 4 HYDROXYL GROUPS, THE IMPROVEMENT WHICH COMPRISES MIXING SAID WATER AND SAID POLYISOCYANATE-MODIFIED POLYHDRIC POLYALKYLENE ETHER WITH FROM ABOUT 0.1 TO ABOUT 5 PARTS BY WEIGHT OF A POLY DI(LOWER ALKYL) SILOXANE PREPARED FROM REACTANTS CONTAINING A DIHALO DIALKYL SILANE AND FROM ABOUT 0.5 MOL PERCENT TO ABOUT 15 MOL PERCENT TRIHALO LOWER ALKYL SILANE.
References Cited (Backward Citations)
US2258218A
Cited
US2901445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |