US2543801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of shaped polyvinyl alcohol objects
Assignee: EIDP Inc
•
Filing: 1948-05-20
•
Granted: 1951-03-06
•
Expires: 1968-05-20
Abstract
No abstract record available.
Inventors
- 👤 Patterson Gordon Derby
- 👤 Stark Henry Moroni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:04
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PROCESS FOR PREPARING WATER-INSOLUBLE SHAPED OBJECTS FROM A WATER-SOLUBLE POLYVINYL ALCOHOL WHEREIN AN AQUEOUS SOLUTION OF A POLUVINYL ALCOHOL CONTAINING 10-100%, BY WEIGHT OF THE POLYVINYL ALCOHOL, OF ALUMINUM OXIDE IN THE FORM OF AN AQUEOUS SOL, IS FORMED INTO A SHAPED OBJECT AND THE WATER IS REMOVED FROM THE SHAPED OBJECT.
Claim 2
Dependent Claim
53 words
A PROCESS FOR PREPARING WATER-INSOLUBLE SHAPED OBJECTS FROM A WATER-SOLUBLE POLYVINYL ALCOHOL WHEREIN AN AQUEOUS SOLUTION OF A POLUVINYL ALCOHOL CONTAINING 10-100%, BY WEIGHT OF THE POLYVINYL ALCOHOL, OF ALUMINUM OXIDE IN THE FORM OF AN AQUEOUS SOL, IS FORMED INTO A SHAPED OBJECT AND THE WATER IS REMOVED FROM THE SHAPED OBJECT.
References Cited (Backward Citations)
US1629161A
Cited
US2162618A
Cited
US2154185A
Cited
US2251296A
Cited
US2236545A
Cited
US2337628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |