US3200089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-linked, rigid, cellular materials and process for their obtention
Assignee: Pneumatiques Caoutchouc Manufacture et Plastiques Kleber Colombes SA
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Filing: 1961-11-21
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Granted: 1965-08-10
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Expires: 1981-11-21
Abstract
No abstract record available.
Inventors
- 👤 Landler Yvan
- 👤 Lebel Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:49
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08F; C08F259/00; C08F259/02; C08F259/04; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/63; C08G18/633; C08G18/637; C08G18/638; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06; C08J2457/00; Y; Y10; Y10S; Y10S264/00; Y10S264/03; Y10S264/18; Y10S8/00; Y10S8/10; Y10S8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN A PROCWSS FOR PREPARING RIGID CELLULAR PRODUCTS WHICH COMPRISES MIXING POLYVINYLCHLORIDE, A POLYISOCYANATE, AND A BLOWING AGENT WHICH DECOMPOSES UNDER THE ACTION OF HEAT, HEATING THE RESULTANT MIXTURE IN A MOLD UNDER PRESSURE, COLLING THE MOLD UNDERPRESSURE, REMOVING THE PRODUCT THUS PRODUCED FROM THE MOLD, AND HEATING THE PRODUCT IN THE PRESENCE OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF WATER AND WATER VAPOR, THE IMPROVEMENT WHICH CONSISTS IN INCORPORATING IN SAID MIXTURE AT LEAST ONE VINYLIDENIC MONOMER POLYMERIXABLE BY A RADICAL REACTION, AND AN ETHYLENICALLY UNSATURATED CARBOXYLIC ACID ANHYDRIDE POLYMERIZABLE WITH SAID MONOMER.
Claim 2
Dependent Claim
96 words
IN A PROCWSS FOR PREPARING RIGID CELLULAR PRODUCTS WHICH COMPRISES MIXING POLYVINYLCHLORIDE, A POLYISOCYANATE, AND A BLOWING AGENT WHICH DECOMPOSES UNDER THE ACTION OF HEAT, HEATING THE RESULTANT MIXTURE IN A MOLD UNDER PRESSURE, COLLING THE MOLD UNDERPRESSURE, REMOVING THE PRODUCT THUS PRODUCED FROM THE MOLD, AND HEATING THE PRODUCT IN THE PRESENCE OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF WATER AND WATER VAPOR, THE IMPROVEMENT WHICH CONSISTS IN INCORPORATING IN SAID MIXTURE AT LEAST ONE VINYLIDENIC MONOMER POLYMERIXABLE BY A RADICAL REACTION, AND AN ETHYLENICALLY UNSATURATED CARBOXYLIC ACID ANHYDRIDE POLYMERIZABLE WITH SAID MONOMER.
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) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |