US2300855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of drilling diamonds
Assignee: Wilbur B Driver Co
•
Filing: 1941-12-09
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Granted: 1942-11-03
•
Expires: 1961-12-09
Abstract
No abstract record available.
Inventors
- 👤 Victor O Allen
- 👤 Richard A Macintosh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:08
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/53; C04B41/80; C04B41/91; Y; Y10; Y10S; Y10S451/00; Y10S451/908; Y10T; Y10T409/00; Y10T409/30; Y10T409/30868; Y10T409/309016
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) | 1945-11-02 | 1946-05-04 | 1946-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-11-02 | 1950-05-04 | 1950-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-11-02 | 1954-05-04 | 1954-11-03 | $7700.00 | Window Closed / Lapsed |