US3544211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary stage for a visual projector
Assignee: Q Panel Corp
•
Filing: 1968-04-22
•
Granted: 1970-12-01
•
Expires: 1988-04-22
Abstract
No abstract record available.
Inventors
- 👤 Percy Frederick Albee Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:58
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/132; Y; Y10; Y10S; Y10S353/00; Y10S353/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US341960A
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US947620A
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US1371102A
Cited
US1463950A
Cited
US2247397A
Cited
US3253358A
Cited
US3264936A
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US3438702A
Cited
US3438703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |