US2556870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable light source having a bimetallic support arm
Assignee: General Electric Co
•
Filing: 1947-09-18
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Granted: 1951-06-12
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Expires: 1967-09-18
Abstract
No abstract record available.
Inventors
- 👤 David L Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:57
CPC Classifications
F; F21; F21V; F21V19/00; F21V19/02; F21S; F21S8/00; F21S8/02; F21S8/028; F21V23/00; F21V33/00; F21V33/0004; F21V33/0012; F21Y; F21Y2113/00; F21Y2113/20
Claims Analysis
Total Claims: 0
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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) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |