Patent US3100981A successfully refreshed from Google Patents.
US3100981A
Expired / Lapsed
US
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Method and apparatus for evaluating the relative abrasiveness of inks
Assignee: Interchemical Corp
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Filing: 1959-10-06
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Granted: 1963-08-20
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Expires: 1979-10-06
Abstract
No abstract record available.
Inventors
- 👤 Loy S Engle
- 👤 Hugh J Dunn
- 👤 Kenneth A Bownes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:00
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/56; G01N3/567
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
77 words
APPARATUS FOR TESTING THE ABRASIVENESS OF INKS COMPRISING A RESERVOIR FOR HOLDING THE INK TO BE TESTED, A GLASS PLATE MOUNTED WITHIN SAID RESERVOIR HAVING A THIN UNIFORM COATING OF HIGH VACUUM EVAPORATED CHROMIUM DEPOSITED ON ONE SURFACE THERROF, A RUBBING MEMBER RECIPROCATABLY MOUNTED WITHIN SAID RESERVIOR, SAID MEMBER HAVING ONE PLANAR SURFACE COVERED WITH A NON-ABRASIVE RESILIENT FABRIC IN FRICTIONAL CONTACT WITH SAID CHROMIUM COATING AND MEANS FOR RECIPROCATING SAID RUBBING MEMBER OVER SAID CHROMIUM COATING.
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) | 1966-08-19 | 1967-02-18 | 1967-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-19 | 1971-02-18 | 1971-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-19 | 1975-02-18 | 1975-08-20 | $7700.00 | Window Closed / Lapsed |