US3736273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an expandable thermoplastic resin
Assignee: Kanegafuchi Chemical Industry Co Ltd
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Filing: 1969-12-29
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Granted: 1973-05-29
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Expires: 1989-12-29
Abstract
Abstract AN EXPANDABLE THERMOPLASTIC RESIN AND A METHOD OF MANUFACTURING THE SAME WHICH CAN CONSIDERABLY SHORTEN THE CURING PERIOD AND FROM WHICH THE CELLULAR MATERIAL FOAMED HAS A UNIFORM CELL SIZE AND A UNIFORM CELL DISTRIBUTION, COMPRISING A THERMOPLASTIC RESIN, A METAL SALT OF AN ALIPHATIC CARBOXYLIC ACID OR AN AROMATIC CARBOXYLIC ACID IN AN AMOUNT OF 2% BY WEIGHT OR LESS OF SAIS THERMOPLASTIC RESIN, THE METAL OF SAID METAL SALT BELONGING TO GROUP II OF THE PERIODIC TABLE AND A GASEOUS EXPANDING AGENT.
Inventors
- 👤 I Hatano
- 👤 H Tsukamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:19
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/16; C08J9/20; C08F; C08F2/00; C08F2/12; C08F2/16; C08J9/0014; C08J9/0023; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/10; C08K5/11; C08K5/12
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |