Patent US3447578A successfully refreshed from Google Patents.
US3447578A
Expired / Lapsed
US
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Cutter head structure
Assignee: KOCKUMS CANCAR Inc A CANADIAN CORP
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Filing: 1965-10-11
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Granted: 1969-06-03
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Expires: 1985-10-11
Abstract
No abstract record available.
Inventors
- 👤 Leonard A Mitten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:40
CPC Classifications
B; B27; B27L; B27L11/00; B27L11/005; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1906; Y10T407/1928; Y10T407/193; Y10T407/1934; Y10T407/1938; Y10T407/22; Y10T407/2222; Y10T407/2238
Claims Analysis
Total Claims: 0
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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) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |