US4331553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frit material for use with phosphor coating in fluorescent lamp
Assignee: Osram Sylvania Inc
•
Filing: 1980-10-20
•
Granted: 1982-05-25
•
Expires: 2000-10-20
Abstract
Abstract A frit material that improves the adhesion of phosphor coatings in fluorescent lamps has the general composition (Ca,Ba)O.B 2 O 3 .P 2 O 5 .
Inventors
- 👤 Albert K. Fan
- 👤 Vincent Chiola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:27
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/16; C03C17/00; C03C17/02; C03C8/00; C03C8/02; C03C8/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
50 words
A low melting point amorphous borate-phosphate frit material having the general composition Ca 1-x+2n Ba x O 1+2n ·mB 2 O 3 ·nP 2 O 5 , wherein x is between about 0.2 to 0.4, n is between about 0.7 to 1.3, and m is between about 1.7 to 2.3.
Claim 2
Dependent Claim
50 words
A low melting point amorphous borate-phosphate frit material having the general composition Ca 1-x+2n Ba x O 1+2n ·mB 2 O 3 ·nP 2 O 5 , wherein x is between about 0.2 to 0.4, n is between about 0.7 to 1.3, and m is between about 1.7 to 2.3.
Claim 3
Dependent Claim
136 words
An aqueous suspension for depositing a phosphor coating on a lamp envelope comprising finely divided phosphor particles dispersed in water; a temporary organic binder which can be essentially completely removed from a lamp envelope on which the phosphor coating has been deposited upon firing under appropriate conditions; and a minor amount of an amorphous borate-phosphate adhesive frit which will bond the phosphor particles to each other and to the lamp envelope upon firing under appropriate conditions, wherein the amount of borate-phosphate frit equals about 2 to 10 weight percent of the phosphate and the frit has the composition Ca 1-x+2n Ba x O 1+2n ·mB 2 O 3 ·nP 2 O 5 , where x is between about 0.2 to 0.4, n is between about 0.7 to 1.3, and m is between about 1.7 to 2.3.
Claim 4
Dependent Claim
136 words
An aqueous suspension for depositing a phosphor coating on a lamp envelope comprising finely divided phosphor particles dispersed in water; a temporary organic binder which can be essentially completely removed from a lamp envelope on which the phosphor coating has been deposited upon firing under appropriate conditions; and a minor amount of an amorphous borate-phosphate adhesive frit which will bond the phosphor particles to each other and to the lamp envelope upon firing under appropriate conditions, wherein the amount of borate-phosphate frit equals about 2 to 10 weight percent of the phosphate and the frit has the composition Ca 1-x+2n Ba x O 1+2n ·mB 2 O 3 ·nP 2 O 5 , where x is between about 0.2 to 0.4, n is between about 0.7 to 1.3, and m is between about 1.7 to 2.3.
References Cited (Backward Citations)
US3661608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |