Patent US3245923A successfully refreshed from Google Patents.
US3245923A
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Cellular polyurethane stabilized with a lead dialkyldithiocarbamate and process for preparing same
Assignee: Union Carbide Corp
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Filing: 1962-05-11
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Granted: 1966-04-12
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Expires: 1982-05-11
Abstract
No abstract record available.
Inventors
- 👤 Anthony S Manzella
- 👤 John E Hyre
- 👤 Deward C Blue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:52
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0033; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08K; C08K5/00; C08K5/36; C08K5/39; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN A PROCESS FOR THE PRODUCTION OF POLYURETHANE FOAMS WHEREIN A POLYETHER POLYOL IS REACTED WITH AN ORGANIC POLYISOCYANATE IN THE PRESENCE OF A BLOWING AGENT, THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN SAID POLYETHER POLYOL FROM ABOUT 100 PARTS BY WEIGHT TO ABOUT 1500 PARTS BY WEIGHT PER MILLION PARTS BY WEIGHT OF SAID POLYETHER POLYOL OF LEAD DIALKYLDITHIOCARBAMANTE, THE LEAD BEING IN THE DIVALENT STATE.
Claim 2
Dependent Claim
66 words
IN A PROCESS FOR THE PRODUCTION OF POLYURETHANE FOAMS WHEREIN A POLYETHER POLYOL IS REACTED WITH AN ORGANIC POLYISOCYANATE IN THE PRESENCE OF A BLOWING AGENT, THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN SAID POLYETHER POLYOL FROM ABOUT 100 PARTS BY WEIGHT TO ABOUT 1500 PARTS BY WEIGHT PER MILLION PARTS BY WEIGHT OF SAID POLYETHER POLYOL OF LEAD DIALKYLDITHIOCARBAMANTE, THE LEAD BEING IN THE DIVALENT STATE.
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) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |