US1803433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Focusing adjustment for lamps
Assignee: CM Hall Lamp Co
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Filing: 1930-06-16
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Granted: 1931-05-05
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Expires: 1950-06-16
Abstract
No abstract record available.
Inventors
- 👤 Alois L Martinek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:30
CPC Classifications
F; F21; F21V; F21V14/00; F21V14/02; F21S; F21S41/00; F21S41/60; F21S41/65; F21S41/657
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1934-05-04 | 1934-11-03 | 1935-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-05-04 | 1938-11-03 | 1939-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-05-04 | 1942-11-03 | 1943-05-05 | $7700.00 | Window Closed / Lapsed |