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US3426174A
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Electron reflection seam tracker
Assignee: RTX Corp
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Filing: 1965-12-09
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Granted: 1969-02-04
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Expires: 1985-12-09
Abstract
No abstract record available.
Inventors
- 👤 Richard H Graham
- 👤 Edward C Wingfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:05
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/244; H01J37/30; H01J37/304; H01J2237/00; H01J2237/244; H01J2237/24405; H01J2237/245; H01J2237/24507
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3291959A
Cited
US3146335A
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US3148265A
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US3152238A
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US3196246A
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US3347701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |