US3070556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of cellular polyurethane plastics
Assignee: Bayer AG
•
Filing: 1959-11-10
•
Granted: 1962-12-25
•
Expires: 1979-11-10
Abstract
No abstract record available.
Inventors
- 👤 Merten Rudolf
- 👤 Brachel Hanswilli Von
- 👤 Holtschmidt Hans
- 👤 Hauptmann Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:47
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/61; C08G2110/00; C08G2110/0083; C08J2375/00; C08J2375/04; C08J2483/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
IN THE PREPARATION OF A CELLULAR POLYURETHANE PLASTIC BY A PROCESS WHICH COMPRISES REACTING A REACTION MIXTURE CONTAINING A BLOWING AGENT, AN ORGANIC POLYISOCYANATE AND AN ORGANIC COMPOUND HAVING AT LEAST TWO REACTIVE HYDROGENS AS DETERMINED BY THE ZEREWITINOFF METHOD, A MOLECULAR WEIGHT OF AT LEAST ABOUT 500, AN OH EQUIVALENT OF FROM ABOUT 100 TO ABOUT 3000, AND AN ACID NUMBER OF NOT SUBSTANTIALLY MORE THAN ABOUT 10, SAID ORGANIC COMPOUND HAVING REACTIVE HYDROGEN BEING REACTIVE WITH SAID POLYISOCYANATE TO FORM A POLYURETHANE, SAID REACTION MIXTURE CONTAINING AN EXCESS OF -NCO GROUPS OVER THAT REQUIRED TO REACT WITH ALL OF THE REACTIVE HYDROGENS OF SAID ORGANIC COMPOUND, THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN SAID REACTION MIXTURE A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN ORGANOPOLYSILANE CONTAINING AT LEAST ONE AMINO GROUP PER MOLECULE AND AN ORGANOPOLYSILOXANE CONTAINING AT LEAST ONE AMINO GROUP PER MOLECULE.
Claim 2
Dependent Claim
146 words
IN THE PREPARATION OF A CELLULAR POLYURETHANE PLASTIC BY A PROCESS WHICH COMPRISES REACTING A REACTION MIXTURE CONTAINING A BLOWING AGENT, AN ORGANIC POLYISOCYANATE AND AN ORGANIC COMPOUND HAVING AT LEAST TWO REACTIVE HYDROGENS AS DETERMINED BY THE ZEREWITINOFF METHOD, A MOLECULAR WEIGHT OF AT LEAST ABOUT 500, AN OH EQUIVALENT OF FROM ABOUT 100 TO ABOUT 3000, AND AN ACID NUMBER OF NOT SUBSTANTIALLY MORE THAN ABOUT 10, SAID ORGANIC COMPOUND HAVING REACTIVE HYDROGEN BEING REACTIVE WITH SAID POLYISOCYANATE TO FORM A POLYURETHANE, SAID REACTION MIXTURE CONTAINING AN EXCESS OF -NCO GROUPS OVER THAT REQUIRED TO REACT WITH ALL OF THE REACTIVE HYDROGENS OF SAID ORGANIC COMPOUND, THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN SAID REACTION MIXTURE A MEMBER SELECTED FROM THE GROUP CONSISTING OF AN ORGANOPOLYSILANE CONTAINING AT LEAST ONE AMINO GROUP PER MOLECULE AND AN ORGANOPOLYSILOXANE CONTAINING AT LEAST ONE AMINO GROUP PER MOLECULE.
References Cited (Backward Citations)
US2902456A
Cited
US2901445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |