US3715153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single-wing light chopper for infrared gas analyzers
Assignee: Siemens AG
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Filing: 1971-10-26
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Granted: 1973-02-06
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Expires: 1991-10-26
Abstract
Abstract BETWEEN A LIGHT SOURCE AND THE INLET OPENING OF A BEAM SPLITTER OF THE TYPE ASSOCIATED WITH AN INFRARED GAS ANALYZER THERE IS DISPOSED A SINGLE-WING ROTARY SHUTTER PROVIDED WITH A SOLE BLOCKING EDGE AND A SOLE OPENING EDGE AND IS DRIVEN BY A COMMUTATORLESS D.C. MOTOR. THE AXIS OF ROTATION OF THE SHUTTER IS ARRANGED PARALLEL WITH THE SYMMETRY AXIS OF THE BEAM SPLITTER AND SPACED FROM THE SYMMETRY PLANE THEREOF.
Inventors
- 👤 G Schunck
- 👤 W Speeter
- 👤 A Randow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:39
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/10; G01J1/20; G01J1/34; G01J1/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |