US2477701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable feed for drilling apparatus
Assignee: Joy Manufacturing Co
•
Filing: 1944-03-25
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Granted: 1949-08-02
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Expires: 1964-03-25
Abstract
No abstract record available.
Inventors
- 👤 Robert A Mccallum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:18
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/32; B23Q2705/00; B23Q2705/10; B23Q2705/16; B23Q2705/165; Y; Y10; Y10T; Y10T408/00; Y10T408/65; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18624; Y10T74/18632
Claims Analysis
Total Claims: 0
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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) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |