US3274880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for occultation detection for space navigation
Assignee: Control Data Corp
•
Filing: 1963-01-31
•
Granted: 1966-09-27
•
Expires: 1983-01-31
Abstract
No abstract record available.
Inventors
- 👤 Robert L Lillestrand
- 👤 William M Hilt
- 👤 Daniel C Harrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:38
CPC Classifications
B; B64; B64G; B64G1/00; B64G1/22; B64G1/24; B64G1/36; B64G1/361
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A METHOD OF DETERMINING THE TIME OF INGRESS OF A STAR BEHIND A FIRST BODY IN SPACE AS VIEWED FROM A SECOND BODY IN SPACE COMPRISING THE STEPS OF GENERATING AND RECORDING THE LEVEL OF A SIGNAL PROPORTIONAL TO THE INTENSITY OF RADIANT ENERGY RECEIVED FROM THE STAR THROUGH AN APERTURE OF A GIVEN AREA WHEN THE PATH OF RADIATION IS CLEAR OF THE FIRST BODY AND ANY ATMOSPHERE THEREABOUT INCREASING SAID APERTURE AREA BY A PREDETERMINED PERCENTAGE OF AREA BY REMOVING RADIATION BLOCKING MEANS, AND GENERATING A TRIGGERING SIGNAL WHEN THE SIGNAL ATTENUATES
Claim 2
Independent Claim
94 words
A METHOD OF DETERMINING THE TIME OF INGRESS OF A STAR BEHIND A FIRST BODY IN SPACE AS VIEWED FROM A SECOND BODY IN SPACE COMPRISING THE STEPS OF GENERATING AND RECORDING THE LEVEL OF A SIGNAL PROPORTIONAL TO THE INTENSITY OF RADIANT ENERGY RECEIVED FROM THE STAR THROUGH AN APERTURE OF A GIVEN AREA WHEN THE PATH OF RADIATION IS CLEAR OF THE FIRST BODY AND ANY ATMOSPHERE THEREABOUT INCREASING SAID APERTURE AREA BY A PREDETERMINED PERCENTAGE OF AREA BY REMOVING RADIATION BLOCKING MEANS, AND GENERATING A TRIGGERING SIGNAL WHEN THE SIGNAL ATTENUATES
References Cited (Backward Citations)
US2631489A
Cited
US2917967A
Cited
US2924754A
Cited
US3131249A
Cited
US2963243A
Cited
US3138712A
Cited
US3100264A
Cited
US3127516A
Cited
US3060823A
Cited
US3141095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |