US2737503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an expanded or cellular polyvinyl chloride composition
Assignee: Goodrich Corp
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Filing: 1950-11-17
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Granted: 1956-03-06
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Expires: 1970-11-17
Abstract
No abstract record available.
Inventors
- 👤 George R Sprague
- 👤 Jr Frank M Scantlebury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:22
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06; Y; Y10; Y10S; Y10S206/00; Y10S206/819; Y10S220/00; Y10S220/14; Y10S220/902; Y10S264/00; Y10S264/14; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249961; Y10T428/249976; Y10T428/249987; Y10T428/249988; Y10T428/249989
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS OF MAKING AN EXPANDED POLYVINYL CHLORIDE PRODUCT WHICH COMPRISES MIXING TOGETHER INGREDIENTS CONSISTING ESSENTIALLY OF A PLASTIC IN POWDERED FORM HAVING POLYVINYL CHLORIDE AS THE PRIMARY AND ESSENTIAL INGREDIENT, A BLOWING AGENT LIBERATING NITROGEN AT AN ELEVATED MOLDING TEMPERATURE, AND A VOLATILE PLASTICIZER, PLACING THE MIXTURE IN A MOLD IN AN AMOUNT SUFFICIENT TO SUBSTANTIALLY FILL THE MOLD, MOLDING THE MIXTURE IN A CLOSED MOLD BY HEATING AT AN ELEVATED MOLDING TEMPERATURE UNDER PRESSURE TO LIBERATE THE NITROGEN FROM THE BLOWING AGENT AND TO TRANSFORM THE RESIN INTO A CONTINUOUS PHASE,
Claim 2
Dependent Claim
93 words
A PROCESS OF MAKING AN EXPANDED POLYVINYL CHLORIDE PRODUCT WHICH COMPRISES MIXING TOGETHER INGREDIENTS CONSISTING ESSENTIALLY OF A PLASTIC IN POWDERED FORM HAVING POLYVINYL CHLORIDE AS THE PRIMARY AND ESSENTIAL INGREDIENT, A BLOWING AGENT LIBERATING NITROGEN AT AN ELEVATED MOLDING TEMPERATURE, AND A VOLATILE PLASTICIZER, PLACING THE MIXTURE IN A MOLD IN AN AMOUNT SUFFICIENT TO SUBSTANTIALLY FILL THE MOLD, MOLDING THE MIXTURE IN A CLOSED MOLD BY HEATING AT AN ELEVATED MOLDING TEMPERATURE UNDER PRESSURE TO LIBERATE THE NITROGEN FROM THE BLOWING AGENT AND TO TRANSFORM THE RESIN INTO A CONTINUOUS PHASE,
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) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |