Patent US2976567A successfully refreshed from Google Patents.
US2976567A
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Process and apparatus for upgrading thermoplastic film
Assignee: Dow Chemical Co
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Filing: 1957-10-16
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Granted: 1961-03-28
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Expires: 1977-10-16
Abstract
No abstract record available.
Inventors
- 👤 William C Jones
- 👤 Walter A Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:19
CPC Classifications
B; B29; B29C; B29C71/00; B29C71/02; B29C53/00; B29C53/32; B29C55/00; B29C55/28; B29C59/00; B29C59/02; B29C59/04; B29C2793/00; B29K; B29K2027/00; B29K2027/08; B29K2995/00; B29K2995/0037; B29K2995/0041; B29K2995/005; B29K2995/0053; B29L; B29L2023/00; B29L2023/001; Y; Y10; Y10S; Y10S206/00; Y10S206/819
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) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |