US3424895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical spark perforator for moving web
Assignee: 3M Co
•
Filing: 1966-12-02
•
Granted: 1969-01-28
•
Expires: 1986-12-02
Abstract
No abstract record available.
Inventors
- 👤 Albert Kenneth Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:34
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/26; B26F1/28; Y; Y10; Y10T; Y10T83/00; Y10T83/02; Y10T83/0207; Y10T83/04; Y10T83/0405; Y10T83/041; Y10T83/0414; Y10T83/283
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |