Patent US3203328A successfully refreshed from Google Patents.
US3203328A
Expired / Lapsed
US
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Full circumferential viewing system
Assignee: Marquardt Corp
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Filing: 1963-02-21
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Granted: 1965-08-31
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Expires: 1983-02-21
Abstract
No abstract record available.
Inventors
- 👤 Harry P Brueggemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:53
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/06; G02B19/00; G02B19/0004; G02B19/0019; G02B19/0023; G02B19/0033; G02B19/0038; G02B23/00; G02B23/02; G02B23/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A FULL CIRCUMFERENTIAL VIEWING SYSTEM FOR PRODUCING AN IMAGE OF A 360* FIELD OF VIEW COMPRISING: A HYPERBOLIC MIRROR HAVING A CONVEX SPECULAR SURFACE LOCATED AT A POSITION SUCH AS TO PERMIT RAYS FROM A SURROUNDING SCENE TO FALL THEREON; A SUBSTANTIALLY SPHERICAL MIRROR HAVING ITS CENTER OF CURVATURE SUBSTANTIALLY COINCIDENT WITH THE CONJUGATE FOCUS OF SAID HYPERBOLIC MIRROR, THE CONCAVE SIDE OF SAID SPHERICAL MIRROR BEING SPECULAR WHEREBY SAID IMAGE OF SAID SCENE COMPRISES A REAL IMAGE
Claim 2
Dependent Claim
78 words
A FULL CIRCUMFERENTIAL VIEWING SYSTEM FOR PRODUCING AN IMAGE OF A 360* FIELD OF VIEW COMPRISING: A HYPERBOLIC MIRROR HAVING A CONVEX SPECULAR SURFACE LOCATED AT A POSITION SUCH AS TO PERMIT RAYS FROM A SURROUNDING SCENE TO FALL THEREON; A SUBSTANTIALLY SPHERICAL MIRROR HAVING ITS CENTER OF CURVATURE SUBSTANTIALLY COINCIDENT WITH THE CONJUGATE FOCUS OF SAID HYPERBOLIC MIRROR, THE CONCAVE SIDE OF SAID SPHERICAL MIRROR BEING SPECULAR WHEREBY SAID IMAGE OF SAID SCENE COMPRISES A REAL IMAGE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |