US3523988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making large celled plastic materials with integral skins
Assignee: Roehr Metals and Plastics Co
•
Filing: 1965-03-22
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Granted: 1970-08-11
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Expires: 1985-03-22
Abstract
No abstract record available.
Inventors
- 👤 Zbislaw M Roehr
- 👤 Richard Berger
- 👤 Paul A Plasse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:41
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C44/505; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/25; B29C48/30; B29C48/305; B29C48/31; B29C48/313; B29C48/36; B29C48/362; B29C48/50; B29C48/505; B29C48/535; B29L; B29L2007/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/249988; Y10T428/249989
Claims Analysis
Total Claims: 0
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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) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |