US3529897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicating mechanism for zero-current instruments
Assignee: P Gossen and Co GmbH
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Filing: 1967-12-29
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Granted: 1970-09-22
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Expires: 1987-12-29
Abstract
No abstract record available.
Inventors
- 👤 Erwin Pfaffenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:16
CPC Classifications
G; G01; G01D; G01D7/00; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01J; G01J1/00; G01J1/42
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) | 1973-09-21 | 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 |