Patent US4024831A successfully refreshed from Google Patents.
US4024831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent ruler having longitudinally positioned colored area for isolating rows of symbols for rapid scanning
Assignee: Individual
•
Filing: 1975-10-10
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Granted: 1977-05-24
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Expires: 1995-10-10
Abstract
Abstract A transparent ruler formed of synthetic resinous materials having a longitudinal strip of contrasting light transmitting properties which may overlie a line of characters in a group of such lines to facilitate the rapid scanning thereof.
Inventors
- 👤 Benjamin Sperling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:12
CPC Classifications
B; B43; B43L; B43L7/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
131 words
As a new article of manufacture, an improved ruler of generally rectangular configuration and as transparent synthetic resinous material; said ruler having first and second edges bordering a planar surface thereof, at least one scale imprinted on said surface adjacent one of said first and second edges, said scale being bordered by a longitudinally extending line spaced inwardly from said first and second edges and parallel thereto, whereby an elongated area of relatively greater light transmissive ability is formed, a portion of said area, medially positioned relative to said first and second edges being tinted along a longitudinally extending axis, said area serving as a means for isolating rows of printed symbols for the rapid scanning thereof; said tinted portion being formed by lamination of a separate strip of tinted material.
Claim 2
Dependent Claim
131 words
As a new article of manufacture, an improved ruler of generally rectangular configuration and as transparent synthetic resinous material; said ruler having first and second edges bordering a planar surface thereof, at least one scale imprinted on said surface adjacent one of said first and second edges, said scale being bordered by a longitudinally extending line spaced inwardly from said first and second edges and parallel thereto, whereby an elongated area of relatively greater light transmissive ability is formed, a portion of said area, medially positioned relative to said first and second edges being tinted along a longitudinally extending axis, said area serving as a means for isolating rows of printed symbols for the rapid scanning thereof; said tinted portion being formed by lamination of a separate strip of tinted material.
Claim 3
Dependent Claim
23 words
Structure in accordance with claim 1, in which said tinted material is formed as result of the application of a flowable tinted material.
References Cited (Backward Citations)
US3352487A
Cited
US1353279A
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US2585421A
Cited
US2841109A
Cited
US3408977A
Cited
US3719161A
Cited
US3739739A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |