US3021560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for casting film
Assignee: EIDP Inc
•
Filing: 1961-03-29
•
Granted: 1962-02-20
•
Expires: 1981-03-29
Abstract
No abstract record available.
Inventors
- 👤 Hamilton William Smith
- 👤 Hinkle Barton Leslie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:29
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/919; B29C48/03; B29C48/07; B29C48/08; B29C48/911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US736791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |