US2894428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light projecting arrangement for projectors
Assignee: LYTAK WERKE GmbH
•
Filing: 1955-12-20
•
Granted: 1959-07-14
•
Expires: 1975-12-20
Abstract
No abstract record available.
Inventors
- 👤 Eber Hans
- 👤 Ruf Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:04
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/20; G03B21/208
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1222119A
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GB464564A
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US2466430A
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US2673489A
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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) | 1962-07-13 | 1963-01-12 | 1963-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-13 | 1967-01-12 | 1967-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-13 | 1971-01-12 | 1971-07-14 | $7700.00 | Window Closed / Lapsed |