US3277028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rigid or semi-rigid cellular materials
Assignee: Pneumatiques Caoutchouc Manufacture et Plastiques Kleber Colombes SA
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Filing: 1964-06-04
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Granted: 1966-10-04
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Expires: 1984-06-04
Abstract
No abstract record available.
Inventors
- 👤 Parker Robert Sydney Richard
- 👤 Taylor Percy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:15
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J9/107; C08J9/102; C08J2201/00; C08J2201/02; C08J2201/026; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06; Y; Y10; Y10S; Y10S264/00; Y10S264/13; Y10S264/61
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN A PROCESS FOR THE PRODUCTION OF A GRIGID OR SEMIRIGID CELLULAR MATERIAL WHICH PROCESS COMPRISES THE STEPS OF MIXING A POLYMER OR COPOLYMER OF VINYL CHLORIDE, A POLYISOCYANATE, A BLOWING AGENT, AN UNSATURATED ANHYDRIDE AND A VINYLIDENIC COMPOUND, HEATING THE MIXTURE IN A MOULD UNDER PRESSURE, COOLING THE MOLD UNDER PRESSURE, REMOVING THE MATERIAL AND FINALY ACHIEVING THE EXPANSION BY HEATING THE MATERIAL IN THE PRESENCE OF WATER OR WATER VAPOUR, THE IMPROVEMENT WHICH CONSISTS IN USING AS THE VINYLIDENIC COM;POUND AN UNSATURATED CYCLIC HYDROCARBON CONTAINING 1 TO 2 DOUBLE BONDS IN THE RING.
Claim 2
Dependent Claim
95 words
IN A PROCESS FOR THE PRODUCTION OF A GRIGID OR SEMIRIGID CELLULAR MATERIAL WHICH PROCESS COMPRISES THE STEPS OF MIXING A POLYMER OR COPOLYMER OF VINYL CHLORIDE, A POLYISOCYANATE, A BLOWING AGENT, AN UNSATURATED ANHYDRIDE AND A VINYLIDENIC COMPOUND, HEATING THE MIXTURE IN A MOULD UNDER PRESSURE, COOLING THE MOLD UNDER PRESSURE, REMOVING THE MATERIAL AND FINALY ACHIEVING THE EXPANSION BY HEATING THE MATERIAL IN THE PRESENCE OF WATER OR WATER VAPOUR, THE IMPROVEMENT WHICH CONSISTS IN USING AS THE VINYLIDENIC COM;POUND AN UNSATURATED CYCLIC HYDROCARBON CONTAINING 1 TO 2 DOUBLE BONDS IN THE RING.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |