US3396627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for measuring surface roughness
Assignee: EDNALITE CORP
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Filing: 1965-04-09
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Granted: 1968-08-13
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Expires: 1985-04-09
Abstract
No abstract record available.
Inventors
- 👤 Rouy Auguste Louis Mar Antoine
- 👤 Alex J Weinstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:42
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
102 words
A DEVICE FOR MEASURING THE ROUGHNESS OF A SURFACE COMPRISING A PLURALITY OF GROUPS OF DIFFERENTLY SPACED LINES OF DIFFERENT THICKNESSES PROVIDED ON AT LEAST ONE PLANAR TARGET MEMBER, SUPPORT MEANS ADAPTED TO HOLD SAID AT LEAST ONE TARGET MEMBER ADJACENT THE SURFACE TO BE MEASURED IN A PLANE AT AN ACUTE ANGLE RELATIVE TO THE SURFACE, AND SIGHTING MEANS MOUNTED ON SAID SUPPORT MEANS AND ESTABLISHING A FIXED LINE OF SIGHT OF AN IMAGE OF A SELECTED ONE OF SAID GROUPS OF LINES FORMED BY REFLECTION THEREOF ONTO THE SURFACE TO BE MEASURED AT AN ANGLE OF INCIDENCE GREATER THAN 45*.
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) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |