US3540323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill having indexable carbide inserts
Assignee: Caterpillar Inc
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Filing: 1968-06-17
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Granted: 1970-11-17
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Expires: 1988-06-17
Abstract
No abstract record available.
Inventors
- 👤 Everett D Rishel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:02
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/0006; B23B51/0007; B23B51/0008; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1906; Y10T407/1908; Y10T407/192; Y10T407/22; Y10T407/2272; Y10T407/2274; Y10T407/2276; Y10T408/00; Y10T408/86; Y10T408/865; Y10T408/868
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) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |