Patent US2654979A successfully refreshed from Google Patents.
US2654979A
Expired / Lapsed
US
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Method of and device for producing specifically oriented polished faces on diamonds
Assignee: Individual
•
Filing: 1950-08-29
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Granted: 1953-10-13
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Expires: 1970-08-29
Abstract
No abstract record available.
Inventors
- 👤 Grodzinski Paul
- 👤 Penkuhn Arno Ludwig Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:17
CPC Classifications
B; B24; B24B; B24B9/00; B24B9/02; B24B9/06; B24B9/16; B24B9/167
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US740902A
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US1103698A
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US1415118A
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US1958021A
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GB558518A
Cited
US2326319A
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US2383131A
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US2377862A
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US2450984A
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US2484574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |