US3508834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric measurement system comprising movable grating
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1969-02-03
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Granted: 1970-04-28
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Expires: 1989-02-03
Abstract
No abstract record available.
Inventors
- 👤 Fromund Hock
- 👤 Knut Heitmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:51
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/20; G01; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/36; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/21; G05B19/23; G05B19/231; G05D3/14; G05D3/1436
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) | 1973-04-27 | 1973-10-27 | 1974-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-27 | 1977-10-27 | 1978-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-27 | 1981-10-27 | 1982-04-28 | $7700.00 | Window Closed / Lapsed |