US3012168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent lamp
Assignee: GTE Sylvania Inc
•
Filing: 1960-03-23
•
Granted: 1961-12-05
•
Expires: 1980-03-23
Abstract
No abstract record available.
Inventors
- 👤 John G Ray
- 👤 Warren C Gungle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:32
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/302
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A FLUORESCENT LAMP COMPRISING A GLASS ENVELOPE, MERCURY VAPOR AND MEANS THROUGH WHICH AN ELECTRIC DISCHARGE IS PRODUCED IN SAID ENVELOPE, A PHOSPHOR COATING ON THE INTERIOR SURFACE OF SAID ENVELOPE, SAID ENVELOPE COMPRISING INGREDIENTS EXPRESSED AS AN OXIDE COMPOSITION OF SIO2 BETWEEN ABOUT 65% AND 75%, NA2O BETWEEN ABOUT 10% AND 12%, K2O BETWEEN ABOUT 4% AND 6%, A12O3 BETWEEN ABOUT 2% AND 3%, CAO BETWEEN ABOUT 3% AND 6%, MGO BETWEEN ABOUT 2% AND 4%, B2O3 BETWEEN ABOUT 3% AND 4%.
Claim 2
Dependent Claim
83 words
A FLUORESCENT LAMP COMPRISING A GLASS ENVELOPE, MERCURY VAPOR AND MEANS THROUGH WHICH AN ELECTRIC DISCHARGE IS PRODUCED IN SAID ENVELOPE, A PHOSPHOR COATING ON THE INTERIOR SURFACE OF SAID ENVELOPE, SAID ENVELOPE COMPRISING INGREDIENTS EXPRESSED AS AN OXIDE COMPOSITION OF SIO2 BETWEEN ABOUT 65% AND 75%, NA2O BETWEEN ABOUT 10% AND 12%, K2O BETWEEN ABOUT 4% AND 6%, A12O3 BETWEEN ABOUT 2% AND 3%, CAO BETWEEN ABOUT 3% AND 6%, MGO BETWEEN ABOUT 2% AND 4%, B2O3 BETWEEN ABOUT 3% AND 4%.
References Cited (Backward Citations)
US1969277A
Cited
US2001504A
Cited
US2152988A
Cited
US2205809A
Cited
US2407379A
Cited
US2719932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |