US3435506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a slot for a screwdriver
Assignee: Individual
•
Filing: 1966-03-17
•
Granted: 1969-04-01
•
Expires: 1986-03-17
Abstract
No abstract record available.
Inventors
- 👤 Ernst Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:43
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/76; Y; Y10; Y10T; Y10T24/00; Y10T24/14; Y10T24/1412; Y10T24/1427; Y10T29/00; Y10T29/49; Y10T29/49462; Y10T29/49467; Y10T29/49469; Y10T29/49995; Y10T29/49996; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19828; Y10T74/19949; Y10T74/19953
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |