Patent US3832312A successfully refreshed from Google Patents.
US3832312A
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US
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Process for making foamed styrene polymers photodegradable
Assignee: Atlantic Richfield Co
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Filing: 1973-03-12
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Granted: 1974-08-27
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Expires: 1993-03-12
Abstract
Abstract EXPANDABLE STYRENE POLYMER PARTICLES WHICH ARE PHOTODEGRABLE ARE PRODUCED BY SUSPENDING STYRENE POLYMER PARTICLES IN AN AQUEOUS MEDIUM AND IMPREGNATING A BLOWING AGENT INTO THE PATICLES IN THE PRESENCE OF 0.05-3.0 PARTS OF BENZOPHENONE PER 100 PARTS OF POLYMER PARTICLES.
Inventors
- 👤 H Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:51
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/16; C08J9/18; C08K; C08K5/00; C08K5/04; C08K5/07; C08J2325/00; Y; Y10; Y10S; Y10S260/00; Y10S260/43; Y10S521/00; Y10S521/91; Y10S521/916
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |