US3278465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of cellular polyurethane materials in the presence of a polysiloxane stabilizer
Assignee: Imperial Chemical Industries Ltd
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Filing: 1963-06-24
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Granted: 1966-10-11
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Expires: 1983-06-24
Abstract
No abstract record available.
Inventors
- 👤 Twitchett Harry James
- 👤 Vickers Edward Jervis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:07
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J2375/00; C08J2375/04; C08J2483/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
PROCESS FOR THE MANUFACTURE OF FOAMED CELLULAR POLYURETHANE MATERIALS BY THE REACTION OF ORGANIC POLYISOCYANATES WITH HYDROXYL GROUP-CONTAINING POLYMERS, CONTAINING AT LEAST TWO ISOCYANATE-REACTIVE GROUPS PER MOLECULE, IN THE PRESENCE OF A BLOWING AGENT SELECTED FROM THE GROUP CONSISTING OF WATER, AT LEAST ONE LOW BOILING POINT LIQUID THAT IS INERT TOWARDS ISOCYANATES AND WATER AND HAS A BOILING POINT BELOW 75*C., AND MIXTURES THEREOF CHARACTERISED IN THAT THERE IS INCORPORATED IN THE REACTION MIXTURE A POLYSILOXANE CONTAINING AT LEAST ONE UNIT OF THE GENERAL FORMULAE
Claim 2
Dependent Claim
86 words
PROCESS FOR THE MANUFACTURE OF FOAMED CELLULAR POLYURETHANE MATERIALS BY THE REACTION OF ORGANIC POLYISOCYANATES WITH HYDROXYL GROUP-CONTAINING POLYMERS, CONTAINING AT LEAST TWO ISOCYANATE-REACTIVE GROUPS PER MOLECULE, IN THE PRESENCE OF A BLOWING AGENT SELECTED FROM THE GROUP CONSISTING OF WATER, AT LEAST ONE LOW BOILING POINT LIQUID THAT IS INERT TOWARDS ISOCYANATES AND WATER AND HAS A BOILING POINT BELOW 75*C., AND MIXTURES THEREOF CHARACTERISED IN THAT THERE IS INCORPORATED IN THE REACTION MIXTURE A POLYSILOXANE CONTAINING AT LEAST ONE UNIT OF THE GENERAL FORMULAE
References Cited (Backward Citations)
US3164557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |