US2377159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of diamond drilling
Assignee: CALLITE TUNGSTEN Corp
•
Filing: 1943-06-26
•
Granted: 1945-05-29
•
Expires: 1963-06-26
Abstract
No abstract record available.
Inventors
- 👤 Kurtz Jacob
- 👤 James D Waldie
- 👤 Spina Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:18
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/53; C04B41/80; C04B41/91; Y; Y10; Y10S; Y10S451/00; Y10S451/908
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1948-05-28 | 1948-11-27 | 1949-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-05-28 | 1952-11-27 | 1953-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-05-28 | 1956-11-27 | 1957-05-29 | $7700.00 | Window Closed / Lapsed |