US3472924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the preparation of biaxially oriented film
Assignee: Dow Chemical Co
•
Filing: 1967-08-21
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Granted: 1969-10-14
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Expires: 1987-08-21
Abstract
No abstract record available.
Inventors
- 👤 Edward R Sederlund
- 👤 Walter Schrenk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:42
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/10; B29C55/12; B29C55/16; B26; B26D; B26D3/00; B26D3/001; B29C55/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2852813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |