US2748652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Planetarium projection device for representing the individual travel of fixed stars upon a screen
Assignee: Carl Zeiss AG
•
Filing: 1953-06-29
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Granted: 1956-06-05
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Expires: 1973-06-29
Abstract
No abstract record available.
Inventors
- 👤 Bauersfeld Walther
- 👤 Werner Helmut
- 👤 Vieweg Albin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:53
CPC Classifications
G; G03; G03B; G03B21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE322507C
Cited
US1616736A
Cited
US1693969A
Cited
US2178352A
Cited
US2168799A
Cited
US2483216A
Cited
US2632359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |