US3293475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multifilament lamp with a full shield for one filament
Assignee: Individual
•
Filing: 1964-02-13
•
Granted: 1966-12-20
•
Expires: 1984-02-13
Abstract
No abstract record available.
Inventors
- 👤 Grunning Sven
- 👤 Nordmark Erling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:29
CPC Classifications
H; H01; H01K; H01K9/00; H01K9/08; F; F21; F21S; F21S41/00; F21S41/40; F21S41/43
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A GLOW LAMP FOR AUTOMOBILE HEADLIGHTS AND THE LIKE, HAVING A LONG DISTANCE FILAMENT AND A DIM FILAMENT AND A SHIELD BELOW SAID DIM FILAMENT, SAID SHIELD EXTENDING FROM THE LAMP BASE FORWARDLY ALONG A SUBSTANTIALLY HORIZONTAL PLANE LEVEL WITH THE CENTER OF THE LAMP, SAID SHIELD COVERING THE MAJOR PART OF THE SPACE WITHIN THE GLASS ENVELOPE ALONG SAID PLANE, THE LATERAL EDGES AND THE FRONT EDGE OF THE SHIELD BEING ONLY SLIGHTLY SPACED FROM THE INNER SIDE OF THE GLASS ENVELOPE, THE LONG DISTANCE FILAMENT BEING SITUATED IN AN APERTURE IN SAID SHIELD AT THE REAR OF SAID DIM FILAMENT.
Claim 2
Dependent Claim
102 words
A GLOW LAMP FOR AUTOMOBILE HEADLIGHTS AND THE LIKE, HAVING A LONG DISTANCE FILAMENT AND A DIM FILAMENT AND A SHIELD BELOW SAID DIM FILAMENT, SAID SHIELD EXTENDING FROM THE LAMP BASE FORWARDLY ALONG A SUBSTANTIALLY HORIZONTAL PLANE LEVEL WITH THE CENTER OF THE LAMP, SAID SHIELD COVERING THE MAJOR PART OF THE SPACE WITHIN THE GLASS ENVELOPE ALONG SAID PLANE, THE LATERAL EDGES AND THE FRONT EDGE OF THE SHIELD BEING ONLY SLIGHTLY SPACED FROM THE INNER SIDE OF THE GLASS ENVELOPE, THE LONG DISTANCE FILAMENT BEING SITUATED IN AN APERTURE IN SAID SHIELD AT THE REAR OF SAID DIM FILAMENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |