US3834801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflective elements
Assignee: Primary Products Ingredients Americas LLC
•
Filing: 1970-09-21
•
Granted: 1974-09-10
•
Expires: 1990-09-21
Abstract
Abstract Projection of an image from a transparent photographic element onto a screen without deterioration or destruction of the transparent photographic element, by projecting a beam of light through a transparent photographic element bearing reflective image areas.
Inventors
- 👤 J Schreckendgust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:44
CPC Classifications
G; G03; G03B; G03B15/00; G03C; G03C5/00; G03C5/08; G03C5/10; G03F; G03F7/00; G03F7/26; G03F7/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
17 words
The article of claim 1, wherein said array of reflective powder comprises a monolayer of white powder.
Claim 2
Dependent Claim
12 words
The article of claim 1, wherein said reflective powder comprises metallic powder.
Claim 3
Dependent Claim
11 words
The article of claim 3, wherein said metallic powder comprises aluminum.
Claim 4
Dependent Claim
48 words
The process of projecting an image from a transparent photographic element onto a screen without deterioration or destruction of the photographic element, which comprises projecting a beam of ligHt through the photographic element of claim 1 to subject said photographic element to over 10,000 lumens per square inch.
References Cited (Backward Citations)
US2399799A
Cited
US2969711A
Cited
US2999034A
Cited
US3441941A
Cited
US3567447A
Cited
JPS6424168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |