US3479588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Displacement measuring device including a spaced four-corner electrode array
Assignee: Canadian Patents and Development Ltd
•
Filing: 1967-05-12
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Granted: 1969-11-18
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Expires: 1987-05-12
Abstract
No abstract record available.
Inventors
- 👤 David M Makow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:09
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR932342A
Cited
US2892152A
Cited
US3109984A
Cited
GB1025712A
Cited
US3218863A
Cited
US3271669A
Cited
US3302459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |