US2197637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color wave projector
Assignee: Individual
•
Filing: 1937-04-14
•
Granted: 1940-04-16
•
Expires: 1957-04-14
Abstract
No abstract record available.
Inventors
- 👤 Maurice H Goldberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:35
CPC Classifications
A; A61; A61N; A61N5/00; A61N5/06; A61N5/0613; A61N5/0618; F; F21; F21V; F21V21/00; F21V21/14; F21V21/22; G; G09; G09F; G09F19/00; G09F19/12; G09F19/18; A61N2005/0658; A61N2005/0662; A61N2005/0663
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) | 1943-04-16 | 1943-10-16 | 1944-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-04-16 | 1947-10-16 | 1948-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-04-16 | 1951-10-16 | 1952-04-16 | $7700.00 | Window Closed / Lapsed |