US3821764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illuminating apparatus
Assignee: Polaroid Corp
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Filing: 1973-01-02
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Granted: 1974-06-28
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Expires: 1993-01-02
Abstract
Abstract A LIGHTING SYSTEM FOR PRODUCING AESTHETICALLY NATURAL AND PLEASING FACIAL LIGHTING FOR PORTRAIT PHOTOGRAHS WHILE ELIMINATING OBJECTIONABLE BACKGROUPD SHADOW. IN ITS MOST BASIC FORM, THE SYSTEM UTILIZES A SINGLE SOURCE OF ARTIFICIAL LI GHT AND A LIGHT DIRECTING ASSEMBLY FOR ILLUMINATING A SUBJECT IN A SPECIFIC MANNER TO AVOID SHADOWS OF THE SUBJECT ON A BACKGROUND WITHIN THE FIELD OF VIEW OF AN OBJECTIVE LENS OF A PHOTOGRAPHIC CAMERA.
Inventors
- 👤 W Shelton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:19
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03
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) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |