Patent US2377271A successfully refreshed from Google Patents.
US2377271A
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Flexible shaft and air-cooled hand piece
Assignee: ANNE R SCHUMANN
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Filing: 1942-12-12
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Granted: 1945-05-29
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Expires: 1962-12-12
Abstract
No abstract record available.
Inventors
- 👤 Schumann Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:37
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/0009; B23Q11/00; B23Q11/0042; B23Q11/005; B23Q11/10; F; F16; F16D; F16D2300/00; F16D2300/02; F16D2300/021; F16D2300/0212; Y; Y02; Y02P; Y02P70/00; Y02P70/10; Y10; Y10S; Y10S29/00; Y10S29/067; Y10S29/083; Y10S82/00; Y10S82/90; Y10T; Y10T409/00; Y10T409/30; Y10T409/303976; Y10T409/306216; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20732; Y10T74/2078; Y10T74/20828
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) | 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 |