US2659931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for stretching film
Assignee: Dow Chemical Co
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Filing: 1952-03-03
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Granted: 1953-11-24
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Expires: 1972-03-03
Abstract
No abstract record available.
Inventors
- 👤 Edward V Dettmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:18
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/10; B29C55/12; B29C55/16; B29C55/165; Y; Y10; Y10S; Y10S264/00; Y10S264/73; Y10T; Y10T83/00; Y10T83/647; Y10T83/6584; Y10T83/6592; Y10T83/6598
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) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |