Patent US3055767A successfully refreshed from Google Patents.
US3055767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of coating fluorescent lamps
Assignee: GTE Sylvania Inc
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Filing: 1956-01-30
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Granted: 1962-09-25
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Expires: 1976-01-30
Abstract
No abstract record available.
Inventors
- 👤 Robert F Quirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:32
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
THE METHOD OF COATING OF FLUORESCENT LAMP ENVELOPE WITH PHOSPHOR, SAID METHOD CONSISTING ESSENTIALLY OF: WASHING A QUANTITY OF HYDROXYETHYL CELLULOSE IN METHYL ALCOHOL TO REMOVE THE SODIUM ACETRATE IMPURITY IN IT, DISSOLVING THE RESULTANT SODIUM-FREE HYDROXYETHYL CELLULOSE IN WATER IN PROPORTIONS OF ABOUT 50 GRAMS OF THE HYDROXYETHYL CELLULOSE TO ABOUT 4 LITERS OF WATER, SUSPENDING A QUANTITY OF INORGANIC PHOSPHOR IN SAID SOLUTION, IN THE PROPORTIONS OF ABOUT 300 GRAMS OF THE TO EACH 250 CC. OF SOLUTION, ADDING ABOUT 3 GRAMS OF AN ANTI-FOAMING AGENT, ADDING ABOUT 0.1 CC. OF A DISPERSING AGENT, APPLYING THE RESULTANT SOLUTION TO THE TUBE TO BE COATED, AT AN AMBIENT TEMPERATURE OF ABOUT 90*F., DRYING AT THAT TEMPERATURE FOR ABOUT AN HOUR AND A HALF, WITH AN AIR FLOW OF ABOUT 25 FEET PER MINUTE THROUGH THE BULB, AND THEN BAKING THE BULB IN A LEHR AT A TEMPERATURE OF ABOUT 500*C. FOR ABOUT ONE MINUTE.
Claim 2
Independent Claim
155 words
THE METHOD OF COATING OF FLUORESCENT LAMP ENVELOPE WITH PHOSPHOR, SAID METHOD CONSISTING ESSENTIALLY OF: WASHING A QUANTITY OF HYDROXYETHYL CELLULOSE IN METHYL ALCOHOL TO REMOVE THE SODIUM ACETRATE IMPURITY IN IT, DISSOLVING THE RESULTANT SODIUM-FREE HYDROXYETHYL CELLULOSE IN WATER IN PROPORTIONS OF ABOUT 50 GRAMS OF THE HYDROXYETHYL CELLULOSE TO ABOUT 4 LITERS OF WATER, SUSPENDING A QUANTITY OF INORGANIC PHOSPHOR IN SAID SOLUTION, IN THE PROPORTIONS OF ABOUT 300 GRAMS OF THE TO EACH 250 CC. OF SOLUTION, ADDING ABOUT 3 GRAMS OF AN ANTI-FOAMING AGENT, ADDING ABOUT 0.1 CC. OF A DISPERSING AGENT, APPLYING THE RESULTANT SOLUTION TO THE TUBE TO BE COATED, AT AN AMBIENT TEMPERATURE OF ABOUT 90*F., DRYING AT THAT TEMPERATURE FOR ABOUT AN HOUR AND A HALF, WITH AN AIR FLOW OF ABOUT 25 FEET PER MINUTE THROUGH THE BULB, AND THEN BAKING THE BULB IN A LEHR AT A TEMPERATURE OF ABOUT 500*C. FOR ABOUT ONE MINUTE.
References Cited (Backward Citations)
US2726966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |