Patent US2699019A successfully refreshed from Google Patents.
US2699019A
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US
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Contour polishing machine
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1951-03-12
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Granted: 1955-01-11
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Expires: 1971-03-12
Abstract
No abstract record available.
Inventors
- 👤 Dackor Emil
- 👤 Edgar F Nelboeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:16
CPC Classifications
B; B24; B24B; B24B21/00; B24B21/16; B24B21/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US933305A
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US1490555A
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US1635399A
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US1675183A
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US1735903A
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US1866848A
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US2109069A
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US2139952A
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US2453972A
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US2479506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-10 | 1958-07-12 | 1959-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-10 | 1962-07-12 | 1963-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-10 | 1966-07-12 | 1967-01-11 | $7700.00 | Window Closed / Lapsed |