US2328843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Making stretched film
Assignee: Wingfoot Corp
•
Filing: 1940-08-03
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Granted: 1943-09-07
•
Expires: 1960-08-03
Abstract
No abstract record available.
Inventors
- 👤 Harold J Osterhof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:48
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/023; B29C55/005; B29C55/10; B29C55/12; B29C55/14; Y; Y10; Y10S; Y10S264/00; Y10S264/73
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-09-06 | 1947-03-08 | 1947-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-09-06 | 1951-03-08 | 1951-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-09-06 | 1955-03-08 | 1955-09-07 | $7700.00 | Window Closed / Lapsed |