US2652387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing condensation products of polyvinyl alochol and aldehydes
Assignee: Wacker Chemie AG
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Filing: 1951-02-14
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Granted: 1953-09-15
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Expires: 1971-02-14
Abstract
No abstract record available.
Inventors
- 👤 Gruber Wolfgang
- 👤 Heckmaier Joseph
- 👤 Zoebelein Hugo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:58
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
PROCESS FOR PRODUCING CONDENSATION PRODUCTS FROM POLYVINYL ALCOHOL AND SATURATED ALDEHYDES WITH AT LEAST TWO CARBON ATOMS BY CONDENSING THE POLYVINYL ALCOHOL IN AQUEOUS SOLUTION WITH THE SATURATED ALDEHYDE IN THE PRESENCE OF A CATALYST WHICH COMPRISES USING PERCHLORIC ACID AS CATALYST, WHEREBY THE REACTION PRODUCT IS PRECIPITATED.
Claim 2
Dependent Claim
48 words
PROCESS FOR PRODUCING CONDENSATION PRODUCTS FROM POLYVINYL ALCOHOL AND SATURATED ALDEHYDES WITH AT LEAST TWO CARBON ATOMS BY CONDENSING THE POLYVINYL ALCOHOL IN AQUEOUS SOLUTION WITH THE SATURATED ALDEHYDE IN THE PRESENCE OF A CATALYST WHICH COMPRISES USING PERCHLORIC ACID AS CATALYST, WHEREBY THE REACTION PRODUCT IS PRECIPITATED.
References Cited (Backward Citations)
US2358355A
Cited
US2422754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |