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Patent US2840918A successfully refreshed from Google Patents.
US2840918A
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US
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Magnetic surface gauge
Assignee: Individual
•
Filing: 1955-11-21
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Granted: 1958-07-01
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Expires: 1975-11-21
Abstract
No abstract record available.
Inventors
- 👤 Fredric C Wildeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:12
CPC Classifications
B; B41; B41F; B41F13/00; B41F13/08; B41F13/20; B41F13/21; G; G01; G01B; G01B7/00; G01B7/02; G01B7/06; G01B7/10; G01B7/105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US464290A
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US793027A
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US842044A
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US1683710A
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US1888454A
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US1996323A
Cited
US2130269A
Cited
US2547717A
Cited
US2704890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |