US3552828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mounting arrangements for a replaceable semi-reflective member of a head up display device
Assignee: Allard Way Holdings Ltd
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Filing: 1968-08-01
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Granted: 1971-01-05
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Expires: 1988-08-01
Abstract
Abstract THE SEMI-REFLECTIVE MEMBER IS REPLACEABLY MOUNTED BY EDGE MEMBERS HAVING SIMILAR TEMPERATURE COEFFICIENT OF EXPANSION. THE EDGE MEMBERS AR MOUNTED ON A FRAMEWORK SO THAT THE SEMI-REFLECTIVE MEMBER CAN BE MOVED BETWEEN AT LEAST TWO PREDETERMINED POSITIONS. THESE POSITIONS ARE FINELY ADJUSTABLE BY AN ACCENTRICALLY MOUNTED ADJUSTING ARRANGEMENT.
Inventors
- 👤 Ernest G Lawrence
- 👤 Thomas H K Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:26
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/01; G02B27/0149; G02B2027/0154; G02B27/0179; G02B2027/0187; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18856
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |