US2532241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl acetal foams
Assignee: Monsanto Chemicals Ltd
•
Filing: 1949-07-09
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Granted: 1950-11-28
•
Expires: 1969-07-09
Abstract
No abstract record available.
Inventors
- 👤 John B Ott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:11
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J9/106; C08K; C08K5/00; C08K5/36; C08K5/43; C08J2329/00; C08J2329/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A PROCESS FOR PREPARING AN INSOLUBLE AND INFUSIBLE FOAMED PRODUCT WHICH COMPRISES MIXING FROM 1 TO 25 PARTS OF DIPHENYL-4,4H-DI(SULFONYL AZIDE) WITH 100 PARTS OF A PLASTICIZED POLYVINYL ACETAL RESIN AND THEN HEATING THE MIXTURE AT 140-150*C.
Claim 2
Dependent Claim
37 words
A PROCESS FOR PREPARING AN INSOLUBLE AND INFUSIBLE FOAMED PRODUCT WHICH COMPRISES MIXING FROM 1 TO 25 PARTS OF DIPHENYL-4,4H-DI(SULFONYL AZIDE) WITH 100 PARTS OF A PLASTICIZED POLYVINYL ACETAL RESIN AND THEN HEATING THE MIXTURE AT 140-150*C.
References Cited (Backward Citations)
US2386995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |