Patent US2580301A successfully refreshed from Google Patents.
US2580301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl chloride resin plasticized with a mixture of polyalkylated benzophenones
Assignee: Sunoco Inc
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Filing: 1949-08-12
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Granted: 1951-12-25
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Expires: 1969-08-12
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Johnson
- 👤 Archibald P Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:52
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A COMPOSITION COMPRISING A POLYVINYL CHLORIDE RESIN PLASTICIZED WITH A MIXTURE OF POLYALKYLATED BENZOPHENONES OBTAINED BY TREATING A PETROLEUM HYDROCARBON FRACTION COMPRISING AROMATICS AND BOILING SUBSTANTIALLY THROUGH THE RANGE 300* F.-400* F. WITH PHOSGENE IN THE PRESENCE OF ALUMINUM CHLORIDE, SAID MIXTURE BOILING THROUGH THE RANGE 392* F.-482* F. AT 4 MM. HG, AND COMPRISING ESSENTIALLY DIARYL KETONES HAVING AN AVERAGE OF 19 CARBON ATOMS PER MOLECULE.
Claim 2
Dependent Claim
67 words
A COMPOSITION COMPRISING A POLYVINYL CHLORIDE RESIN PLASTICIZED WITH A MIXTURE OF POLYALKYLATED BENZOPHENONES OBTAINED BY TREATING A PETROLEUM HYDROCARBON FRACTION COMPRISING AROMATICS AND BOILING SUBSTANTIALLY THROUGH THE RANGE 300* F.-400* F. WITH PHOSGENE IN THE PRESENCE OF ALUMINUM CHLORIDE, SAID MIXTURE BOILING THROUGH THE RANGE 392* F.-482* F. AT 4 MM. HG, AND COMPRISING ESSENTIALLY DIARYL KETONES HAVING AN AVERAGE OF 19 CARBON ATOMS PER MOLECULE.
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) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |