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US5134028C1
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Thermoplastic polyester series resin foamed material and production process thereof
Assignee: Sekisui Kaseihin Kogyo KK
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Filing: 1990-12-26
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Granted: 2001-12-11
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Expires: 2010-12-26
Abstract
Abstract A thermoplastic polyester series foamed material having a thickness of at least 3 mm and an apparent density of from 0.05 to 0.7 g/cm<3> is diclosed, wherein the crystallinity of the resin in the surface portion within 0.5 mm from the surface of the foamed material is not more than 30% and at least 1% lower than the crystallinity of the resin in the central portion of the foamed material.
Inventors
- 👤 Motoshige Hayashi
- 👤 Norio Amano
- 👤 Takaaki Hirai
- 👤 Takeshi Taki
- 👤 Masatoshi Ishibashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:10
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; B; B29; B29C; B29C44/00; B29C44/20; B29C44/22; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/25; B29C48/88; B29C48/91; B29C48/911; B29C48/9135; B29C48/914; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/086; B29K; B29K2105/00; B29K2105/06; B29K2105/12; C08J2367/00; C08J2367/02; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/249986; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T428/26
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-12-10 | 2005-06-11 | 2005-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-12-10 | 2009-06-11 | 2009-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-12-10 | 2013-06-11 | 2013-12-11 | $7700.00 | Window Closed / Lapsed |