US3555704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cloud projector
Assignee: Carl Zeiss AG
•
Filing: 1970-01-29
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Granted: 1971-01-19
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Expires: 1990-01-29
Abstract
Abstract A CLOUD PROJECTOR IS PROVIDED WITH TRANSPARENT EQUATORIAL BELT OR RING CARRYING A PICTURE OF THE CLOUDS TO BE PROJECTED. THIS RING WHICH FORMS A PART OF A SPHERICAL SHELL IS ROTATABLE ABOUT ITS HORIZONTAL AXIS AND IS SUPPORTED BY A BASE STRUCTURE WHICH IS ROTATABLE ABOUT A VERTICAL AXIS PASSING THROUGH THE CENTER OF SAID SPHERICAL SHELL.
Inventors
- 👤 Kurt Schrumpf
- 👤 Franz Busch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:32
CPC Classifications
G; G09; G09B; G09B27/00; G09B27/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |