US2563772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High molecular weight halogen-containing organic materials stabilized with iron salts
Assignee: Shell Development Co
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Filing: 1949-03-22
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Granted: 1951-08-07
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Expires: 1969-03-22
Abstract
No abstract record available.
Inventors
- 👤 Harry A Cheney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:39
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR PRODUCING A COLORLESS, COLORSTABLE, THERMOPLASTIC RESIN FROM POLYVINYL CHLORIDE WHICH COMPRISES MIXING THE SAID POLYVINYL CHLORIDE WITH A PLASTICIZER AD FERRIC CHLORIDE IN AN AMOUNT SUFFICIENT TO FURNISH 10 PARTS OF IRON PER MILLION PARTS OF POLYMER AND SUBJECTING A COMPOSITION CONTAINING THIS MIXTURE TO A MILLING AND MOLDING OPERATION, THE HEAT EMPLOYED IN THE SAID MILLING AND MOLDING OPERATION BEING INSUFFICIENT TO CONVERT THE COMPOSITION INTO A NONTHERMOPLASTIC PRODUCT.
Claim 2
Dependent Claim
73 words
A PROCESS FOR PRODUCING A COLORLESS, COLORSTABLE, THERMOPLASTIC RESIN FROM POLYVINYL CHLORIDE WHICH COMPRISES MIXING THE SAID POLYVINYL CHLORIDE WITH A PLASTICIZER AD FERRIC CHLORIDE IN AN AMOUNT SUFFICIENT TO FURNISH 10 PARTS OF IRON PER MILLION PARTS OF POLYMER AND SUBJECTING A COMPOSITION CONTAINING THIS MIXTURE TO A MILLING AND MOLDING OPERATION, THE HEAT EMPLOYED IN THE SAID MILLING AND MOLDING OPERATION BEING INSUFFICIENT TO CONVERT THE COMPOSITION INTO A NONTHERMOPLASTIC PRODUCT.
References Cited (Backward Citations)
US2157997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |