US3380280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet metal bending brake
Assignee: MARK PRODUCTS CORP VAN
•
Filing: 1965-09-16
•
Granted: 1968-04-30
•
Expires: 1985-09-16
Abstract
No abstract record available.
Inventors
- 👤 Ralph H Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:01
CPC Classifications
B; B21; B21D; B21D5/00; B21D5/04; B21D5/042; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US393583A
Cited
US505567A
Cited
US941783A
Cited
US1402801A
Cited
US1527547A
Cited
US1983790A
Cited
US2687157A
Cited
US3093219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |