US1930774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-color lamp
Assignee: Individual
•
Filing: 1930-12-17
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Granted: 1933-10-17
•
Expires: 1950-12-17
Abstract
No abstract record available.
Inventors
- 👤 Scherfee Mary A Dickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:51
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/0029; B60Q1/0041; B60Q1/0058; B60Q1/26; B60Q1/2607; B60Q1/44; B60Q1/56; F; F21; F21S; F21S41/00; F21S41/10; F21S41/12; F21S41/125; F21W; F21W2111/00; F21W2111/02
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) | 1936-10-16 | 1937-04-17 | 1937-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-10-16 | 1941-04-17 | 1941-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-10-16 | 1945-04-17 | 1945-10-17 | $7700.00 | Window Closed / Lapsed |