US3134741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of cellular polyurethane plastics
Assignee: Bayer AG
•
Filing: 1960-04-15
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Granted: 1964-05-26
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Expires: 1980-04-15
Abstract
No abstract record available.
Inventors
- 👤 Merten Rudolf
- 👤 Bayer Otto
- 👤 Simmler Walter
- 👤 Loew Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:00
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/24; C08G18/242; C08J; C08J9/00; C08J9/0061; C08J2375/00; C08J2375/04; C08J2485/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
THE METHOD OF SIMULTANEOUSLY CATALYZING AND STABILIZING THE REACTION BETWEEN AN ORGANIC POLYISOCYANATE AND AN ORGANIC COMPOUND CONTAINING AT LEAST TWO ACTIVE HYDROGEN CONTAINING GROUPS AS DETERMINED BY THE ZEREWITINOFF METHOD IN THE PRESENCE OF A BLOWING AGENT LEADING TO THE PRODUCTION OF A CELLULAR POLYURETHANE WHICH COMPRISES CONDUCTING SAID REACTION IN THE PRESENCE OF A SILICON COMPOUND HAVING THE FORMULA
Claim 2
Independent Claim
61 words
THE METHOD OF SIMULTANEOUSLY CATALYZING AND STABILIZING THE REACTION BETWEEN AN ORGANIC POLYISOCYANATE AND AN ORGANIC COMPOUND CONTAINING AT LEAST TWO ACTIVE HYDROGEN CONTAINING GROUPS AS DETERMINED BY THE ZEREWITINOFF METHOD IN THE PRESENCE OF A BLOWING AGENT LEADING TO THE PRODUCTION OF A CELLULAR POLYURETHANE WHICH COMPRISES CONDUCTING SAID REACTION IN THE PRESENCE OF A SILICON COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US2955056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |