Patent US3303042A successfully refreshed from Google Patents.
US3303042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for phosphor coating a fluorescent tube of irregular section
Assignee: Philips North America LLC
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Filing: 1963-05-24
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Granted: 1967-02-07
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Expires: 1983-05-24
Abstract
No abstract record available.
Inventors
- 👤 Allan K Reed
- 👤 Robert W Repsher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:10
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
THE METHOD OF PHOSPHOR COATING THE INTERIOR SURFACE OF A FLUORESCENT LAMP TUBE WHICH AHAS AN IRREGULAR CROSS SECTION, WHICH METHOD COMPRISES: (A) FLOWING OVER THE INTERIOR TUBE SURFACE TO BE COATED A COATING COMPOSITION COMPRISING: (1) FROM ABOUT 25% TO 50% BY WEIGHT OF INORGANIC PHOSPHOR TO BE COATED, (2) FROM ABOUT 0.1% TO 1% BE WEIGHT OF A WATER SOLUBLE POLYMER OF ACRYLIC ACID CROSSLINKED WITH FROM ABOUT 0.75% TO 2% OF POLYALLYL SUCROSE, (3) FROM ABOUT 0.3% TO 1.8% BY WEIGHT OF AN INTERPOLYMER CONTAINING A PLURALITY OF GROUPS OF THE GENERAL FORMULA:
Claim 2
Independent Claim
96 words
THE METHOD OF PHOSPHOR COATING THE INTERIOR SURFACE OF A FLUORESCENT LAMP TUBE WHICH AHAS AN IRREGULAR CROSS SECTION, WHICH METHOD COMPRISES: (A) FLOWING OVER THE INTERIOR TUBE SURFACE TO BE COATED A COATING COMPOSITION COMPRISING: (1) FROM ABOUT 25% TO 50% BY WEIGHT OF INORGANIC PHOSPHOR TO BE COATED, (2) FROM ABOUT 0.1% TO 1% BE WEIGHT OF A WATER SOLUBLE POLYMER OF ACRYLIC ACID CROSSLINKED WITH FROM ABOUT 0.75% TO 2% OF POLYALLYL SUCROSE, (3) FROM ABOUT 0.3% TO 1.8% BY WEIGHT OF AN INTERPOLYMER CONTAINING A PLURALITY OF GROUPS OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US3055767A
Cited
US3006781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |