Patent US3379421A successfully refreshed from Google Patents.
US3379421A
Expired / Lapsed
US
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Control of material processing device
Assignee: Westinghouse Electric Corp
•
Filing: 1966-12-14
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Granted: 1968-04-23
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Expires: 1986-12-14
Abstract
No abstract record available.
Inventors
- 👤 Richard E J Putman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:41
CPC Classifications
B; B02; B02C; B02C25/00; G; G01; G01F; G01F1/00; G01F1/74; G05; G05D; G05D11/00; G05D11/02; G05D11/13; G05D11/131; G05D11/133; G05D11/134
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3170677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |