US1404016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill bit and lubricator
Assignee: ERNEST A BORGSTROM
•
Filing: 1918-02-15
•
Granted: 1922-01-17
•
Expires: 1938-02-15
Abstract
No abstract record available.
Inventors
- 👤 Engelbrekt Mary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:48
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/10; B23B; B23B51/00; B23B51/06; Y; Y10; Y10S; Y10S29/00; Y10S29/063; Y10T; Y10T408/00; Y10T408/44
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) | 1925-01-16 | 1925-07-18 | 1926-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-01-16 | 1929-07-18 | 1930-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-01-16 | 1933-07-18 | 1934-01-17 | $7700.00 | Window Closed / Lapsed |