Patent US3537400A successfully refreshed from Google Patents.
US3428872A
Expired / Lapsed
US
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Body comprising a mark for indirect detection of an objective part and method of detecting the position of said objective part
Assignee: Hitachi Ltd
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Filing: 1966-07-29
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Granted: 1969-02-18
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Expires: 1986-07-29
Abstract
No abstract record available.
Inventors
- 👤 Hisashi Yoshida
- 👤 Yuzaburo Sakamoto
- 👤 Takeshi Hosaka
- 👤 Toshio Numakura
- 👤 Kenichi Isoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:30
CPC Classifications
H; H10; H10W; H10W46/00; H01; H01J; H01J37/00; H01J37/30; H01J37/302; H01J37/3023; H10P; H10P72/00; H10P72/50; H10P72/53; Y; Y10; Y10S; Y10S438/00; Y10S438/975
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |