US2815307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processes for coating and drying photographic layers
Assignee: EIDP Inc
•
Filing: 1953-08-20
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Granted: 1957-12-03
•
Expires: 1973-08-20
Abstract
No abstract record available.
Inventors
- 👤 Beck Robert Haun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:12
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/74; B; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/25; B29C48/88; B29C48/91; B29C48/911; B29C48/9135; B29C48/914; B29C48/915; B29C48/916
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
THE PROCESS WHICH COMPRISES EXTRUDING IN A COATING ZONE WITHIN A CHAMBER A VISCOUS AQUEOUS SOLUTION ONTO A MOVING FLEXIBLE WEB TRAVELING AT A LINEAR SPEED OF AT LEAST 150 FEET PER MINUTE AND 1 TO 200 TIMES FASTER THAN THE LINEAR SPEED OF EXTRUSION OF THE DISPERSION, IN THE SUBSTANTIAL ABSENCE OF NON-CONDENSABLE GASES, BUT IN THE PRESENCE OF ADDED READILY CONDENSABLE VAPORS OF INERT, WATER-SOLUBLE LIQUIDS HAVING A BOILING POINT OF NOT GREATER THAN 230*F, AT ATMOSPHERIC PRESSURE, PASSING THE COATED WEB AT THE SAME RATE OF SPEED THROUGH A HEATED DRYING ZONE WITHIN SAID CHAMBER FOR 2 TO 15 SECONDS, SAID DRYING ZONE BEING MAINTAINED AT A PRESSURE OF 5 TO 192 MM, OF MERCURY AND THE COATED LAYER BEING AT A TEMPERATURE OF 34*C. TO 150*F. DURING THE DRYING STAGE.
Claim 2
Dependent Claim
134 words
THE PROCESS WHICH COMPRISES EXTRUDING IN A COATING ZONE WITHIN A CHAMBER A VISCOUS AQUEOUS SOLUTION ONTO A MOVING FLEXIBLE WEB TRAVELING AT A LINEAR SPEED OF AT LEAST 150 FEET PER MINUTE AND 1 TO 200 TIMES FASTER THAN THE LINEAR SPEED OF EXTRUSION OF THE DISPERSION, IN THE SUBSTANTIAL ABSENCE OF NON-CONDENSABLE GASES, BUT IN THE PRESENCE OF ADDED READILY CONDENSABLE VAPORS OF INERT, WATER-SOLUBLE LIQUIDS HAVING A BOILING POINT OF NOT GREATER THAN 230*F, AT ATMOSPHERIC PRESSURE, PASSING THE COATED WEB AT THE SAME RATE OF SPEED THROUGH A HEATED DRYING ZONE WITHIN SAID CHAMBER FOR 2 TO 15 SECONDS, SAID DRYING ZONE BEING MAINTAINED AT A PRESSURE OF 5 TO 192 MM, OF MERCURY AND THE COATED LAYER BEING AT A TEMPERATURE OF 34*C. TO 150*F. DURING THE DRYING STAGE.
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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) | 1960-12-02 | 1961-06-03 | 1961-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-02 | 1965-06-03 | 1965-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-02 | 1969-06-03 | 1969-12-03 | $7700.00 | Window Closed / Lapsed |