US3781233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blowing agents
Assignee: Bayer AG
•
Filing: 1972-05-25
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Granted: 1973-12-25
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Expires: 1992-05-25
Abstract
Abstract THE INVENTION RELATES TO THE USE OF BISBENZAZIMIDE COMPOUNDS AS BLOWING AGENTS FOR THE PRODUCTION OF CELLULAR AND POROUS ARTICLES FROM ACRYLONITRILE, BUTADIENE AND STYRENE COPOLYMERS. THE BLOWING AGENTS DO NOT LIBERATE ANY CORROSIVE, DISCOLORING, MALODOROUS OR TOXIC DECOMPOSITION PRODUCTS.
Inventors
- 👤 E Muller
- 👤 W Wirth
- 👤 J Blahak
- 👤 H Rohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:47
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J9/108
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |