US2784060A
Expired / Lapsed
US
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Process for preparing a potassium silicate solution
Assignee: EIDP Inc
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Filing: 1953-11-25
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Granted: 1957-03-05
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Expires: 1973-11-25
Abstract
No abstract record available.
Inventors
- 👤 Santmyers Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:11
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/32; H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/221
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS FOR PREPARING A POTASSIUM SILICATE SOLUTION ADAPTED FOR USE AS A SUSPENDING AND CEMENTING AGENT FRO PHOSPHORS IN MAKING TELEVISION PICTURE TUBES, THE STEPS COMPRISING ADDING POTASSIUM HYDROXIDE TO AN AQUEOUS SOLUTION OF POTASSIUM SILICATE HAVING A WEIGHT RATIO OF SIO2:K2O TO 2.30 TO 2.70 TO ADJUST THE RATIO TO 2.15 TO 2.25, HEATING AT A TEMPERATURE ABOVE 95* C. AND BELOW 100* C. FOR AT LEAST ABOUT FIVE HOURS.
Claim 2
Dependent Claim
72 words
A PROCESS FOR PREPARING A POTASSIUM SILICATE SOLUTION ADAPTED FOR USE AS A SUSPENDING AND CEMENTING AGENT FRO PHOSPHORS IN MAKING TELEVISION PICTURE TUBES, THE STEPS COMPRISING ADDING POTASSIUM HYDROXIDE TO AN AQUEOUS SOLUTION OF POTASSIUM SILICATE HAVING A WEIGHT RATIO OF SIO2:K2O TO 2.30 TO 2.70 TO ADJUST THE RATIO TO 2.15 TO 2.25, HEATING AT A TEMPERATURE ABOVE 95* C. AND BELOW 100* C. FOR AT LEAST ABOUT FIVE HOURS.
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) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |