Patent US3346536A successfully refreshed from Google Patents.
US3346536A
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Pvc resin containing a keto acetic (a) acid ester or (b) anhydride, and a metal (a) phenolate or (b) carboxylic acid salt
Assignee: Argus Chemical Corp
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Filing: 1964-01-22
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Granted: 1967-10-10
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Expires: 1984-01-22
Abstract
No abstract record available.
Inventors
- 👤 Otto S Kauder
- 👤 Norman L Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:14
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A POLYVINYL CHLORIDE STABILIZER COMPOSITION CAPABLE OF IMPROVING THE INITIAL CLARITY AND RESISTANCE TO DETERIORATION WHEN HEATED AT 350*F. OF POLYVINYL CHLORIDE RESINS, CONSISTING ESSENTIALLY OF A NITROGEN-FREE KETO ACETIC ACID COMPOUND HAVING AT LEAST 8 CARBON ATOMS, SELECTED FROM THE GROUP CONSISTING OF KETO ACETIC ACID ESTERS HAVING THE FORMULA:
Claim 2
Dependent Claim
51 words
A POLYVINYL CHLORIDE STABILIZER COMPOSITION CAPABLE OF IMPROVING THE INITIAL CLARITY AND RESISTANCE TO DETERIORATION WHEN HEATED AT 350*F. OF POLYVINYL CHLORIDE RESINS, CONSISTING ESSENTIALLY OF A NITROGEN-FREE KETO ACETIC ACID COMPOUND HAVING AT LEAST 8 CARBON ATOMS, SELECTED FROM THE GROUP CONSISTING OF KETO ACETIC ACID ESTERS HAVING THE FORMULA:
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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) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |