Patent US3368918A successfully refreshed from Google Patents.
US3368918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal recording technique
Assignee: Northrop Grumman Systems Corp
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Filing: 1962-09-26
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Granted: 1968-02-13
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Expires: 1982-09-26
Abstract
No abstract record available.
Inventors
- 👤 Miro Lumeno Frank
- 👤 Vincent J Gale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:54
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/04; G01N29/06; G01N29/0609; G01N29/0618; G01N29/0636
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
189 words
A METHOD OF MAKING THREE DIMENSIONAL RECORDING MEMBER HAVING A COMPOUND CURVATURE FORMED WITH A VARYING CIRCUMFERENCE AND HAVING A FINE GRAIN RECORDING SURFACE FOR PROVIDING HIGH DEFINITION ELECTRICAL RECORDING COMPRISING THE STEPS OF: FORMING A SELF-SUPPORTING BASE MEMBER HAVING A COMPOUNDLY CURVED SURFACE WITH A VARYING CIRCUMFERENCE, SPRAYING A COATING OF A WATER SUSPENSION OF SMALL PARTICLE OIL FURNACE CARBON BLACK TO UNIFORMLY COVER THE SURFACE TO BE RECORDED WITH A THIN LAYER WITHOUT CAUSING RUNNING OF THE SPRAY OVER THE SURFACE, SAID WATER SUSPENSION HAVING AT LEAST 1% BY WEIGHT OF THE LIQUID SPRAY AND AT LEAST 5% BY WEIGHT OF THE SOLID CONTENT OF THE SPRAY CONSISTING OF SMALL PARTICLE CARBON BLACK AND THE REMAINDER COMPRISING WATER, BINDER, DISPERSING AGENT, THICKENER, AND ADDITIONAL CARBON PARTICLE, DRYING THE SPRAYED COATING BY HEATING THE BASE MEMBER TO A TEMPERATURE SIGNIFICANTLY ABOVE AMBIENT TEMPERATURE TO FORM A HIGH ELECTRICAL REISTANCE, FINE GRAIN UNIFORM COATING OF THE SMALL PARTICLE CARBON BLACK OVER THE SURFACE THEREBY TO PROVIDE HIGH IMAGE RESOLUTION IN THE RECORDING MEMBER, AND SPRAYING AN ADHERENT OUTER COATING OF A DIFFERENT COLOR ON TOP OF THE BASE COATING.
Claim 2
Independent Claim
189 words
A METHOD OF MAKING THREE DIMENSIONAL RECORDING MEMBER HAVING A COMPOUND CURVATURE FORMED WITH A VARYING CIRCUMFERENCE AND HAVING A FINE GRAIN RECORDING SURFACE FOR PROVIDING HIGH DEFINITION ELECTRICAL RECORDING COMPRISING THE STEPS OF: FORMING A SELF-SUPPORTING BASE MEMBER HAVING A COMPOUNDLY CURVED SURFACE WITH A VARYING CIRCUMFERENCE, SPRAYING A COATING OF A WATER SUSPENSION OF SMALL PARTICLE OIL FURNACE CARBON BLACK TO UNIFORMLY COVER THE SURFACE TO BE RECORDED WITH A THIN LAYER WITHOUT CAUSING RUNNING OF THE SPRAY OVER THE SURFACE, SAID WATER SUSPENSION HAVING AT LEAST 1% BY WEIGHT OF THE LIQUID SPRAY AND AT LEAST 5% BY WEIGHT OF THE SOLID CONTENT OF THE SPRAY CONSISTING OF SMALL PARTICLE CARBON BLACK AND THE REMAINDER COMPRISING WATER, BINDER, DISPERSING AGENT, THICKENER, AND ADDITIONAL CARBON PARTICLE, DRYING THE SPRAYED COATING BY HEATING THE BASE MEMBER TO A TEMPERATURE SIGNIFICANTLY ABOVE AMBIENT TEMPERATURE TO FORM A HIGH ELECTRICAL REISTANCE, FINE GRAIN UNIFORM COATING OF THE SMALL PARTICLE CARBON BLACK OVER THE SURFACE THEREBY TO PROVIDE HIGH IMAGE RESOLUTION IN THE RECORDING MEMBER, AND SPRAYING AN ADHERENT OUTER COATING OF A DIFFERENT COLOR ON TOP OF THE BASE 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) | 1971-02-12 | 1971-08-14 | 1972-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-12 | 1975-08-14 | 1976-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-12 | 1979-08-14 | 1980-02-13 | $7700.00 | Window Closed / Lapsed |