Patent AT171853B successfully refreshed from Google Patents.
Patent US3501280A successfully refreshed from Google Patents.
US3501280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slitter knives
Assignee: Metal Carbides Corp
•
Filing: 1959-10-21
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Granted: 1970-03-17
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Expires: 1979-10-21
Abstract
No abstract record available.
Inventors
- 👤 George E Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:56
CPC Classifications
B; B24; B24D; B24D5/00; B24D5/12; B23; B23D; B23D35/00; B23D35/001; Y; Y10; Y10T; Y10T83/00; Y10T83/929; Y10T83/9372; Y10T83/9403
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A ROTARY SLITTER KNIFE FOR SLITTING METAL STRIP AND SHEET COMPRISING A BONDED HARD METAL CARBIDE RIM AS THE CUTTING ELEMENTS OF SAID KNIFE, SAID RIM BEING MOUNTED ON A METAL BUSHING BY A SUPPORTING MEMBER DISPOSED BETWEEN AT LEAST A PART OF SAID BUSHING AND SAID RIM, SAID SUPPORTING MEMBER CONSISTING ESSENTIALLY OF A HARDENED
Claim 2
Dependent Claim
56 words
A ROTARY SLITTER KNIFE FOR SLITTING METAL STRIP AND SHEET COMPRISING A BONDED HARD METAL CARBIDE RIM AS THE CUTTING ELEMENTS OF SAID KNIFE, SAID RIM BEING MOUNTED ON A METAL BUSHING BY A SUPPORTING MEMBER DISPOSED BETWEEN AT LEAST A PART OF SAID BUSHING AND SAID RIM, SAID SUPPORTING MEMBER CONSISTING ESSENTIALLY OF A HARDENED
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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) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |