US2496901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for coating cathode-ray tubes
Assignee: Hartford National Bank and Trust Co
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Filing: 1944-07-14
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Granted: 1950-02-07
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Expires: 1964-07-14
Abstract
No abstract record available.
Inventors
- 👤 Adriaan Jacobus Van Hoorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:51
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/88; H01J2229/00; H01J2229/88; H01J2229/882
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
IN THE MANUFACTURE OF CATHODE RAY TUBES, THE METHOD COMPRISING THE STEPS OF APPLYING A COATING TO THE INNER SIDE WALLS OF THE TUBE WITH A GRAPHITE-WATER SOLUBLE ORGANIC BINDER MATERIAL HAVING AN ALKALINE INGREDIENT FROM THE GROUP CONSISTING OF MAGNESIUM OXIDE, ALUMINUM OXIDE AND CALCIUM OXIDE; MAKING THE TUBE TO VOLATILIZE THE WATER SOLUBLE ORGANIC BINDER; THEN APPLYING A COATING OF ADHESIVE MATERIAL FROM THE GROUPS CONSISTING ESSENTIALLY OF ACID PHOSPHATES AND ACID BORATES TO THE ADJACENT END
Claim 2
Dependent Claim
79 words
IN THE MANUFACTURE OF CATHODE RAY TUBES, THE METHOD COMPRISING THE STEPS OF APPLYING A COATING TO THE INNER SIDE WALLS OF THE TUBE WITH A GRAPHITE-WATER SOLUBLE ORGANIC BINDER MATERIAL HAVING AN ALKALINE INGREDIENT FROM THE GROUP CONSISTING OF MAGNESIUM OXIDE, ALUMINUM OXIDE AND CALCIUM OXIDE; MAKING THE TUBE TO VOLATILIZE THE WATER SOLUBLE ORGANIC BINDER; THEN APPLYING A COATING OF ADHESIVE MATERIAL FROM THE GROUPS CONSISTING ESSENTIALLY OF ACID PHOSPHATES AND ACID BORATES TO THE ADJACENT END
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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) | 1953-02-06 | 1953-08-08 | 1954-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-06 | 1957-08-08 | 1958-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-06 | 1961-08-08 | 1962-02-07 | $7700.00 | Window Closed / Lapsed |