Patent US3391497A successfully refreshed from Google Patents.
US3391497A
Expired / Lapsed
US
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Roll grinding and gaging apparatus
Assignee: Farrel Corp
•
Filing: 1964-11-17
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Granted: 1968-07-09
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Expires: 1984-11-17
Abstract
No abstract record available.
Inventors
- 👤 Alfred T Parrella
- 👤 Gene R Gagliardi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:43
CPC Classifications
B; B23; B23Q; B23Q15/00; B24; B24B; B24B49/00; B24B49/02; B24B49/04; B24B5/00; B24B5/02; B24B5/04; G; G05; G05B; G05B2219/00; G05B2219/30; G05B2219/37; G05B2219/37345; G05B2219/45; G05B2219/45161; G05B2219/50; G05B2219/50152
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US972196A
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US1808392A
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US1792043A
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US2689409A
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US2984953A
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US3169323A
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US3089293A
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US3088250A
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US3281995A
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US3263374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |