US2669751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of cellular thermoplastic products
Assignee: Dow Chemical Co
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Filing: 1950-06-29
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Granted: 1954-02-23
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Expires: 1970-06-29
Abstract
No abstract record available.
Inventors
- 👤 Mccurdy John Lloyd
- 👤 Long Chancey Edward De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:38
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/461; B29C44/3442; B29C48/00; B29C48/03; B29C48/25; B29C48/36; B29C48/375; B29C48/38; B29C48/50; B29C48/505; B29C48/51; B29C48/515; B29C48/78; B29C48/80; B29C48/83; B29C48/832; B29C48/834; B29C48/84; B29C48/845; B29C48/85; B29C48/86; B29C48/87; C; C08; C08J; C08J9/00; C08J9/04; C08J9/12
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) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |