US3435231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical means for following the relative movement of two marks on a specimen during tensile testing
Assignee: Instron Holdings Ltd
•
Filing: 1965-08-10
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Granted: 1969-03-25
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Expires: 1985-08-10
Abstract
No abstract record available.
Inventors
- 👤 John H Griffiths
- 👤 Barrie K Poulson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:39
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3043184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |