US2934997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cinematograph screen having improved properties
Assignee: Andrew Smith Harkness Ltd
•
Filing: 1957-02-25
•
Granted: 1960-05-03
•
Expires: 1977-02-25
Abstract
No abstract record available.
Inventors
- 👤 Harkness Thomas Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:18
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A CINEMATOGRAPH SCREEN COMPRISING AN OPAQUE WHITE SCREEN BASE MATERIAL IN SHEET FORM AND ON ONE SIDE OF SAID BASE A SURFACE COATING LAYER COMPRISING THE SOLIDS CONTENT OF A LACQUER COMPOSITION COMPRISING A BINDER INGREDIENT AND A SOLID REFLECTIVE INGREDIENT IN LAMELLAR OR PLATE-LIKE CRYSTALLINE FORM WHEREIN THE LAMELLAR CRYSTALS OF THE LACQUER COMPOSITION ARE INTERMINGLED WITH A CRYSTALLINE ORGANIC MATERIAL OF THE GROUP CONSISTING OF COMMERCIAL STEARIC ACID AND METAL SALTS OF STEARIC ACID, SAID CRYSTALLINE ORGANIC MATERIAL BEING IN NEEDLE AND LEAF FORMS AND SERVING TO TILT THE LAMELLAR CRYSTALS AT A VARIETY OF ANGELS WITH RESPECT TO THE OPAQUE WHITE SCREEN BASE MATERIAL.
Claim 2
Dependent Claim
107 words
A CINEMATOGRAPH SCREEN COMPRISING AN OPAQUE WHITE SCREEN BASE MATERIAL IN SHEET FORM AND ON ONE SIDE OF SAID BASE A SURFACE COATING LAYER COMPRISING THE SOLIDS CONTENT OF A LACQUER COMPOSITION COMPRISING A BINDER INGREDIENT AND A SOLID REFLECTIVE INGREDIENT IN LAMELLAR OR PLATE-LIKE CRYSTALLINE FORM WHEREIN THE LAMELLAR CRYSTALS OF THE LACQUER COMPOSITION ARE INTERMINGLED WITH A CRYSTALLINE ORGANIC MATERIAL OF THE GROUP CONSISTING OF COMMERCIAL STEARIC ACID AND METAL SALTS OF STEARIC ACID, SAID CRYSTALLINE ORGANIC MATERIAL BEING IN NEEDLE AND LEAF FORMS AND SERVING TO TILT THE LAMELLAR CRYSTALS AT A VARIETY OF ANGELS WITH RESPECT TO THE OPAQUE WHITE SCREEN BASE MATERIAL.
References Cited (Backward Citations)
US1293433A
Cited
US1747425A
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US1676553A
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US1926923A
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US1891849A
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US2002733A
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US2246452A
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US2568599A
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GB656651A
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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) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |