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US3020680A
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Contour grinder
Assignee: AT&T Inc
•
Filing: 1958-06-26
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Granted: 1962-02-13
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Expires: 1978-06-26
Abstract
No abstract record available.
Inventors
- 👤 George W Soderman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:13
CPC Classifications
H; H03; H03H; H03H3/00; H03H3/007; H03H3/02; B; B24; B24B; B24B11/00; Y; Y10; Y10S; Y10S451/00; Y10S451/913
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1102558A
Cited
US2087514A
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US2149409A
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US2291000A
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US2405417A
Cited
US2548418A
Cited
US2589488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |