Patent US2827831A successfully refreshed from Google Patents.
US2827831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long range image projector
Assignee: Individual
•
Filing: 1955-08-30
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Granted: 1958-03-25
•
Expires: 1975-08-30
Abstract
No abstract record available.
Inventors
- 👤 Elion Herbert
- 👤 Walter H Thall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:06
CPC Classifications
G; G09; G09F; G09F19/00; G09F19/12; G09F19/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1566260A
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US1650591A
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US1800211A
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US1989336A
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US2192886A
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US2195392A
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US2165246A
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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) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |