Patent US3397315A successfully refreshed from Google Patents.
US3397315A
Expired / Lapsed
US
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Method and apparatus for evaluating the printing speed of diazotype materials
Assignee: Defiance Azon Corp
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Filing: 1966-05-11
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Granted: 1968-08-13
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Expires: 1986-05-11
Abstract
No abstract record available.
Inventors
- 👤 Robert C Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:32
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
THE METHOD OF DETERMINING THE PRINTING SPEED OF DIAZO COATED MATERIALS, SUCH AS PAPER, WHICH COMPRISES EXPOSING A FIRST PORTION OF SIAD MATERIAL TO RADIATION REDOMINANTLY IN THE ULTRAVOILET SPECTRUM FROM A FIXED SOURCE FOR A PRESET TIME, THEREAFTER EXPOSING A SECOND PORTION OF SAID MATERIAL TO SAID SOURCE WHILE CONTINUING EXPOSURE OF SAID FIRST PORTION, INITIATING THE START OF AN ELAPSED TIME COUNTER UPON EXPOSURE OF SAID SECOND PORTION, PHOTOELECTRICALLY SENSING EACH OF SAID PORTIONS AND AUTOMATICALLY STOPPING SAID COUNTER WHEN THE PHOTOELECTRIC SENSING OF SAID SECOND PORTION MATCHES THAT OF SAID FIRST PORTION, THE ELAPSED TIME INDICATION OF SAID COUNTER REPRESENTING A MEASURE OF THE PRINTING SPEED OF SAID MATERIAL.
Claim 2
Independent Claim
112 words
THE METHOD OF DETERMINING THE PRINTING SPEED OF DIAZO COATED MATERIALS, SUCH AS PAPER, WHICH COMPRISES EXPOSING A FIRST PORTION OF SIAD MATERIAL TO RADIATION REDOMINANTLY IN THE ULTRAVOILET SPECTRUM FROM A FIXED SOURCE FOR A PRESET TIME, THEREAFTER EXPOSING A SECOND PORTION OF SAID MATERIAL TO SAID SOURCE WHILE CONTINUING EXPOSURE OF SAID FIRST PORTION, INITIATING THE START OF AN ELAPSED TIME COUNTER UPON EXPOSURE OF SAID SECOND PORTION, PHOTOELECTRICALLY SENSING EACH OF SAID PORTIONS AND AUTOMATICALLY STOPPING SAID COUNTER WHEN THE PHOTOELECTRIC SENSING OF SAID SECOND PORTION MATCHES THAT OF SAID FIRST PORTION, THE ELAPSED TIME INDICATION OF SAID COUNTER REPRESENTING A MEASURE OF THE PRINTING SPEED OF SAID MATERIAL.
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 |