Patent US2950504A successfully refreshed from Google Patents.
US2950504A
Expired / Lapsed
US
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Process for molding hard polyvinyl chloride
Assignee: Individual
•
Filing: 1957-05-20
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Granted: 1960-08-30
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Expires: 1977-05-20
Abstract
No abstract record available.
Inventors
- 👤 Suzuki Shigemasa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:14
CPC Classifications
B; B29; B29C; B29C39/00; B29C41/00; B29C41/02; B29C41/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR MOLDING HARD POLYVINYL CHLORIDE RESINS OF HIGH DEGREE OF POLYMERIZATIN AND HAVING A HIGH SOFTENING POINT WHICH COMPRISES FORMING A FLUID SUSPENSION OF SAID RESIN IN A FLUID MEDIUM CONTAINING A WATER SOLUBLE LIQUID MOLDING ADJUVANT SELECTED FROM THE GROUP OF COMPOUNDS CONSISTING OF GLYCERIN DIACETATE, POLYETHYLENE GLYCOL MONOSTEARATES AND POLYETHYLENE GLYCOL DIETHYLETHERS, APPLYING SAID FLUID SUSPENSION TO A MOLDING SURFACE, HEATING SAID FLUID SUSPENSION TO CAUSE IT TO JELL WHILE IN POSITION ON SAID MOLDING SURFACE, WASHING SAID
Claim 2
Dependent Claim
82 words
A PROCESS FOR MOLDING HARD POLYVINYL CHLORIDE RESINS OF HIGH DEGREE OF POLYMERIZATIN AND HAVING A HIGH SOFTENING POINT WHICH COMPRISES FORMING A FLUID SUSPENSION OF SAID RESIN IN A FLUID MEDIUM CONTAINING A WATER SOLUBLE LIQUID MOLDING ADJUVANT SELECTED FROM THE GROUP OF COMPOUNDS CONSISTING OF GLYCERIN DIACETATE, POLYETHYLENE GLYCOL MONOSTEARATES AND POLYETHYLENE GLYCOL DIETHYLETHERS, APPLYING SAID FLUID SUSPENSION TO A MOLDING SURFACE, HEATING SAID FLUID SUSPENSION TO CAUSE IT TO JELL WHILE IN POSITION ON SAID MOLDING SURFACE, WASHING SAID
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-30 | 1964-02-29 | 1964-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-30 | 1968-02-29 | 1968-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-30 | 1972-02-29 | 1972-08-30 | $7700.00 | Window Closed / Lapsed |