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US3530378A
Expired / Lapsed
US
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Lamp indicator for the balance of a wheatstone bridge
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1968-08-16
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Granted: 1970-09-22
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Expires: 1988-08-16
Abstract
No abstract record available.
Inventors
- 👤 Werner Holle
- 👤 Arthur Kessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:56
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/18; G03B17/20; G01; G01J; G01J1/00; G01J1/42; G01J1/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3040179A
Cited
US3063010A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |