Patent US2985536A successfully refreshed from Google Patents.
US2985536A
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US
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Composition of matter comprising a high molecular weight polymer and an acetal or ketal of a hydroxycarboxylic acid
Assignee: Dehydag Deutsche Hydrierwerke GmbH
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Filing: 1957-03-27
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Granted: 1961-05-23
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Expires: 1977-03-27
Abstract
No abstract record available.
Inventors
- 👤 Stein Werner
- 👤 Offermann Willy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/156; C08K5/06; C09; C09D; C09D101/00; C09D101/08; C09D101/16; C09D101/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
A COMPOSITION OF MATTER COMPRISING A HIGH MOLECULAR WEIGHT POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYVINYL CHLORIDE, CHLORINATED RUBBER AND NITROCELLULOSE AND, AS A PLASTICIZER, FROM 1 TO 70% BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACETALS OF HYDROXYCARBOXYLIC ACID ESTERS AND KETALS OF HYDROXYCARBOXYLIC ACID ESTERS, SAID COMPOUND HAVING A STRUCTURAL FORMULA SELECTED FROM THE GROUP CONSISTING OF
References Cited (Backward Citations)
US2815351A
Cited
US2820813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |