US2537996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical viewer for vehicle instruments
Assignee: Individual
•
Filing: 1945-01-17
•
Granted: 1951-01-16
•
Expires: 1965-01-17
Abstract
No abstract record available.
Inventors
- 👤 Wilbur R Hankes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:56
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/01; G02B27/0101; B; B60; B60K; B60K2360/00; B60K2360/20; B60K2360/33; B60K2360/334; G02B27/0149; G02B2027/0165; G02B2027/0169
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-15 | 1954-07-17 | 1955-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-15 | 1958-07-17 | 1959-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-15 | 1962-07-17 | 1963-01-16 | $7700.00 | Window Closed / Lapsed |