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Patent US2528338A successfully refreshed from Google Patents.
US2528338A
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Polyvinyl acetal compositions
Assignee: Monsanto Chemicals Ltd
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Filing: 1949-12-08
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Granted: 1950-10-31
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Expires: 1969-12-08
Abstract
No abstract record available.
Inventors
- 👤 Robert E Cairns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:58
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; C08K5/5406
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A COMPOSITION COMPRISING A POLYVINYL ACETAL RESIN, A PLASTICIZER AND FROM 0.1 TO 5.0 PARTS PER 100 PARTS OF RESIN OF A COMPOUND HAVING THE FORMULA R3F SI, WHEREIN R IS TAKEN FROM THE GROUP CONSISTING OF ARYL GROUPS, HALOGEN SUBSTITUTED ARYL GROUPS AND ALKYL SUBSTITUTED ARYL GROUPS IN WHICH THE ALKYL GROUP CONTAINS FROM 1 TO 8 CARBON ATOMS.
Claim 2
Dependent Claim
60 words
A COMPOSITION COMPRISING A POLYVINYL ACETAL RESIN, A PLASTICIZER AND FROM 0.1 TO 5.0 PARTS PER 100 PARTS OF RESIN OF A COMPOUND HAVING THE FORMULA R3F SI, WHEREIN R IS TAKEN FROM THE GROUP CONSISTING OF ARYL GROUPS, HALOGEN SUBSTITUTED ARYL GROUPS AND ALKYL SUBSTITUTED ARYL GROUPS IN WHICH THE ALKYL GROUP CONTAINS FROM 1 TO 8 CARBON ATOMS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |