US3626644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making solid diamond drills
Assignee: Individual
•
Filing: 1969-07-17
•
Granted: 1971-12-14
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Expires: 1989-07-17
Abstract
Abstract A METHOD OF MACHINING SOLID DRILLS WHEREIN SUCH DRILLS ARE MACHINED WITHOUT REGARD TO NATURAL CLEAVAGE LINES. THE DRILLS ARE MACHINED TO A DESIRED THREE-DIMENSIONAL CONFIGURATION BY PROVIDING A YIELDABLE ENGAGEMENT OF THE DIAMOUNT WITH AN ENDLESS MACHINING MEMBER IN ACCORDANCE WITH THE SURFACES WHICH ARE TO BE MACHINED.
Inventors
- 👤 John A Cupler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:55
CPC Classifications
B; B24; B24D; B24D18/00; Y; Y10; Y10T; Y10T408/00; Y10T408/89
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |