Patent US3203306A successfully refreshed from Google Patents.
US3203306A
Expired / Lapsed
US
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Optical ray concentrator
Assignee: Individual
•
Filing: 1961-09-25
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Granted: 1965-08-31
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Expires: 1981-09-25
Abstract
No abstract record available.
Inventors
- 👤 Lefferts Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:27
CPC Classifications
G; G02; G02B; G02B3/00; G02B3/02; G02B3/08; Y; Y10; Y10S; Y10S250/00; Y10S250/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A DEVICE FOR CONCENTRATING OPTICAL RAYS BY REFRACTION, SAID DEVICE COMPRISING: (A) A FOLDABLE, TRANSPARENT SHEET OF PLASTIC MATERIAL; (B) A SERIES OF DIOPTRIC ELEMENTS IN AT LEAST ONE SURFACE OF SAID SHEET, SAI DIOPTRIC ELEMENTS FORMING A PATTERN CAPABLE OF FOCUSSING GENERALLY OPTICAL RAYS INTO A CONCENTRATED IMAGE WHEN SAID SHEET IS MAINTAINED IN AN UNFOLDED CONFIGURATION; AND
Claim 2
Independent Claim
59 words
A DEVICE FOR CONCENTRATING OPTICAL RAYS BY REFRACTION, SAID DEVICE COMPRISING: (A) A FOLDABLE, TRANSPARENT SHEET OF PLASTIC MATERIAL; (B) A SERIES OF DIOPTRIC ELEMENTS IN AT LEAST ONE SURFACE OF SAID SHEET, SAI DIOPTRIC ELEMENTS FORMING A PATTERN CAPABLE OF FOCUSSING GENERALLY OPTICAL RAYS INTO A CONCENTRATED IMAGE WHEN SAID SHEET IS MAINTAINED IN AN UNFOLDED CONFIGURATION; AND
References Cited (Backward Citations)
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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) | 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 |