US3385683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making and applying an abrasive to metal surfaces
Assignee: Individual
•
Filing: 1963-12-09
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Granted: 1968-05-28
•
Expires: 1983-12-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward B Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:55
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/50; B; B24; B24D; B24D18/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/932; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12097
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
THE METHOD OF PRODUCING A HARD, LONG WEARING, LOAD BEARING SURFACE ON A ROTARY DRILL BIT, COMPRISING MIXING FINELY GROUND TUNGSTEN POWDER WITH FINELY GROUND METALLIC BONDING POWDER FOR CEMENTING GRANULES OF THE TUNGSTEN PARTICLES TOGETHER, PRESSING THE MIXED POWDERS IN CAVITIES HAVING A GEOMETRIC SHAPE AND FREE OF ACUTE ANGLES TO FORM INDIVIDUAL MASSES HAVING THE CONTOUR OF SAID CAVITIES,
Claim 2
Independent Claim
61 words
THE METHOD OF PRODUCING A HARD, LONG WEARING, LOAD BEARING SURFACE ON A ROTARY DRILL BIT, COMPRISING MIXING FINELY GROUND TUNGSTEN POWDER WITH FINELY GROUND METALLIC BONDING POWDER FOR CEMENTING GRANULES OF THE TUNGSTEN PARTICLES TOGETHER, PRESSING THE MIXED POWDERS IN CAVITIES HAVING A GEOMETRIC SHAPE AND FREE OF ACUTE ANGLES TO FORM INDIVIDUAL MASSES HAVING THE CONTOUR OF SAID CAVITIES,
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) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |