Patent US2918762A successfully refreshed from Google Patents.
US2918762A
Expired / Lapsed
US
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Abrasive devices
Assignee: Dart Industries Inc
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Filing: 1957-05-06
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Granted: 1959-12-29
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Expires: 1977-05-06
Abstract
No abstract record available.
Inventors
- 👤 Hurst Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:36
CPC Classifications
B; B24; B24D; B24D13/00; B24D13/14; B24D13/16; B24D11/00; B24D11/001; B24D11/003; B24D13/02; B24D13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1913261A
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US2199615A
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US2259941A
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US2284716A
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US2335902A
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US2468686A
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US2704916A
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US2769284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |