Patent US3469351A successfully refreshed from Google Patents.
US3469351A
Expired / Lapsed
US
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Method of and apparatus for machining disk-shaped workpieces
Assignee: ERNST THIELENHAUS MAS FAB FA
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Filing: 1966-07-29
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Granted: 1969-09-30
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Expires: 1986-07-29
Abstract
No abstract record available.
Inventors
- 👤 Ernst Thielenhaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:39
CPC Classifications
B; B24; B24B; B24B7/00; B24B7/10; B24B7/16; B24B7/17; B24B41/00; B24B41/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1627858A
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DE514794C
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DE583754C
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US2077364A
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US2275061A
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US2375333A
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US2517193A
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US3001337A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |