Patent US3542702A successfully refreshed from Google Patents.
US3542702A
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US
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Method of making cross-linked polypropylene resin foams
Assignee: Toray Industries Inc
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Filing: 1967-12-28
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Granted: 1970-11-24
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Expires: 1987-12-28
Abstract
No abstract record available.
Inventors
- 👤 Hiroshi Okada
- 👤 Isamu Tamai
- 👤 Atsushi Osakada
- 👤 Minoru Oyama
- 👤 Masaaki Yamada
- 👤 Shunji Ohkubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:05
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/04; C08J9/06; C08J9/10; C08K; C08K5/00; C08K5/01; C08K5/04; C08K5/14; C08K5/16; C08K5/22; C08K5/23; C08L; C08L23/00; C08L23/02; C08L23/10; C08L57/00; C08J2323/00; C08J2323/02; C08J2323/10; C08J2323/12; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S264/16; Y10S264/18; Y10S521/00; Y10S521/915
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-23 | 1974-05-25 | 1974-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-23 | 1978-05-25 | 1978-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-23 | 1982-05-25 | 1982-11-24 | $7700.00 | Window Closed / Lapsed |