Patent JPS5743879A successfully refreshed from Google Patents.
Patent US3308074A successfully refreshed from Google Patents.
US3308074A
Expired / Lapsed
US
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Processes for the manufacture of cellular products
Assignee: Pneumatiques Caoutchouc Manufacture et Plastiques Kleber Colombes SA
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Filing: 1963-10-23
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Granted: 1967-03-07
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Expires: 1983-10-23
Abstract
No abstract record available.
Inventors
- 👤 Landler Yvan
- 👤 Lebel Pierre Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:25
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J2201/00; C08J2201/02; C08J2201/026; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
AN IMPROVED PROCESS FOR THE MANUFACTURE OF RIGID CELLULAR PRODUCTS HAVING A POLYVINYL CHLORIDE BASE, COMPRISING THE STEPS OF HEATING, IN A FIRST STAGE, WITHIN AN AIRTIGHT MOLD UNDER PRESSURE A STARTING MIXTURE HAVING A POLYVINYL CHLORIDE BASE AND ADDITIONALLY CONTAINING A POLYISOCYANATE, A BLOWING AGENT AND AN ETHYLENICALLY UNSATURATED POLYMERIZABLE MONOMER, REMOVING THE CELLULAR PRODUCT FROM SAID MOLD IN A HOT STATE AT A TEMPERATURE OF ABOUT 90 TO 140*C., AND REACTING, IN A SECOND STAGE, THE CELLULAR PRODUCT REMOVED FROM THE MOLD WITH HOT WATER OR STREAM.
Claim 2
Dependent Claim
89 words
AN IMPROVED PROCESS FOR THE MANUFACTURE OF RIGID CELLULAR PRODUCTS HAVING A POLYVINYL CHLORIDE BASE, COMPRISING THE STEPS OF HEATING, IN A FIRST STAGE, WITHIN AN AIRTIGHT MOLD UNDER PRESSURE A STARTING MIXTURE HAVING A POLYVINYL CHLORIDE BASE AND ADDITIONALLY CONTAINING A POLYISOCYANATE, A BLOWING AGENT AND AN ETHYLENICALLY UNSATURATED POLYMERIZABLE MONOMER, REMOVING THE CELLULAR PRODUCT FROM SAID MOLD IN A HOT STATE AT A TEMPERATURE OF ABOUT 90 TO 140*C., AND REACTING, IN A SECOND STAGE, THE CELLULAR PRODUCT REMOVED FROM THE MOLD WITH HOT WATER OR STREAM.
References Cited (Backward Citations)
US3160689A
Cited
US3200089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |