US3416028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for operating multifilament incandescent lamps at different intensities
Assignee: GTE Sylvania Inc
•
Filing: 1966-01-03
•
Granted: 1968-12-10
•
Expires: 1986-01-03
Abstract
No abstract record available.
Inventors
- 👤 Robert E Levin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:16
CPC Classifications
H; H05; H05B; H05B39/00; H05B39/04; H05B39/041; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1749520A
Cited
GB397000A
Cited
FR1108589A
Cited
US3032688A
Cited
USRE26119E
Cited
US3028523A
Cited
US3138737A
Cited
US3300711A
Cited
US3323013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |