US3513501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film width controller
Assignee: Dow Chemical Co
•
Filing: 1967-09-07
•
Granted: 1970-05-26
•
Expires: 1987-09-07
Abstract
No abstract record available.
Inventors
- 👤 Harold L Hearns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:30
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92085; B29C2948/92104; B29C2948/92114; B29C2948/92133; B29C2948/92819; B29C2948/92857; B29C2948/92904; B29C48/03; B29C48/09; B29C48/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2295399A
Cited
US2289933A
Cited
US2810316A
Cited
US2762077A
Cited
US2931917A
Cited
US3341888A
Cited
US3368007A
Cited
US3396219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |