Patent US3030855A successfully refreshed from Google Patents.
US3030855A
Expired / Lapsed
US
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Optical projection display apparatus
Assignee: SHOP O RAMA Inc
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Filing: 1958-03-17
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Granted: 1962-04-24
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Expires: 1978-03-17
Abstract
No abstract record available.
Inventors
- 👤 Jr William N Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:53
CPC Classifications
G; G03; G03B; G03B21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1877441A
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US1921853A
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US1945926A
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US1903950A
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US1931668A
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US1957947A
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US2101126A
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US2430893A
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US2436032A
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US2608126A
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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) | 1965-04-23 | 1965-10-23 | 1966-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-23 | 1969-10-23 | 1970-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-23 | 1973-10-23 | 1974-04-24 | $7700.00 | Window Closed / Lapsed |