Patent US2543236A successfully refreshed from Google Patents.
US2543236A
Expired / Lapsed
US
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Polishing machine for turbine blades
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1948-12-29
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Granted: 1951-02-27
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Expires: 1968-12-29
Abstract
No abstract record available.
Inventors
- 👤 Dackor Emil
- 👤 Edgar F Nelboeck
- 👤 Thiel Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:48
CPC Classifications
B; B24; B24B; B24B21/00; B24B21/16; B24B21/165; B24B27/00; B24B27/0023; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/519
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE16141E
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US676700A
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US1490631A
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US1459085A
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US1905651A
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US2082020A
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US2123171A
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US2261902A
Cited
US2461948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |