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Patent US3578549A successfully refreshed from Google Patents.
US3578549A
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Expandable plastic articles
Assignee: Dow Chemical Co
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Filing: 1969-11-24
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Granted: 1971-05-11
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Expires: 1989-11-24
Abstract
Abstract EXPANDABLE SYNTHETIC RESINOUS SHEETS ARE PROVIDED WHICH HAVE MAJOR EXPANSION IN ONLY ONE DIRECTION. THE LIMITED EXPANSION IS OBTAINED BY EMPLOYING AXIALLY ORIENTED SHEETS.
Inventors
- 👤 Kenneth J Cleereman
- 👤 Lowell S Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:08
CPC Classifications
B; B32; B32B; B32B27/00; B65; B65D; B65D65/00; B65D65/38; B65D65/44; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1376; Y10T428/1379; Y10T428/24; Y10T428/24777; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/249987; Y10T428/249991
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |