Patent US2416749A successfully refreshed from Google Patents.
US2416749A
Expired / Lapsed
US
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Hollow milling machine
Assignee: AT&T Teletype Corp
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Filing: 1943-03-15
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Granted: 1947-03-04
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Expires: 1963-03-15
Abstract
No abstract record available.
Inventors
- 👤 Grey Victor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:58
CPC Classifications
B; B23; B23F; B23F15/00; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1946; Y10T409/00; Y10T409/30; Y10T409/30868; Y10T409/308792; Y10T409/308848; Y10T74/00; Y10T74/14; Y10T74/1418; Y10T74/1424
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US396796A
Cited
US457719A
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US1110274A
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US1036720A
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US1260271A
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US1822730A
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US2290590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-03 | 1950-09-02 | 1951-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-03 | 1954-09-02 | 1955-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-03 | 1958-09-02 | 1959-03-04 | $7700.00 | Window Closed / Lapsed |