Patent US3573232A successfully refreshed from Google Patents.
US3573232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of foamed materials
Assignee: Bayer AG
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Filing: 1967-07-17
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Granted: 1971-03-30
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Expires: 1987-07-17
Abstract
Abstract IMPROVED PROCESS OF PRODUCING FOAMED MATERIALS FROM A COPOLYMERIZABLE MIXTURE OF UNSATURATED POLYESTERS AND A MONOMERIC POLYMERIZABLE VINYL COMPOUND EMPLOYING AS FOAMING AGENT A CARBONIC ACID ESTER ANHYDRIDE WHEREIN SAID FOAMING AGENT LIBERATES CARBON DIOXIDE WITHOUT THE APPLICATION OF EXTERNAL HEAT BY VIRTUE OF THE PRESENCE OF CERTAIN METAL COMPOUNDS.
Inventors
- 👤 Werner Kloker
- 👤 Franz Alfes
- 👤 Leonhard Goerden
- 👤 Karl Raichle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:01
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/08; B; B26; B26B; B26B19/00; B26B19/02; B26B19/04; B26B19/10; B26B19/107; B26B19/38
Claims Analysis
Total Claims: 0
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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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |