US4201449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen
Assignee: Individual
•
Filing: 1978-05-18
•
Granted: 1980-05-06
•
Expires: 1998-05-18
Abstract
Abstract A photographic front projection screen having a base with a front surface facing a projection source. A coating of aluminum ink applied to the front surface of the base to form a reflective surface with the coating of aluminum ink applied by silk screening, painting or printing. A protective coating covers the reflective surface formed by said aluminum ink.
Inventors
- 👤 John S. Campion
- 👤 Van E. Steed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:10
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
32 words
A photographic front projection screen including: a base having a front surface to face a projection source, and a coating of reflective aluminum ink applied to the front surface of said base.
Claim 2
Dependent Claim
32 words
A photographic front projection screen including: a base having a front surface to face a projection source, and a coating of reflective aluminum ink applied to the front surface of said base.
Claim 3
Dependent Claim
17 words
The screen of claim 1 in which said coating of aluminum ink is applied by silk screening.
Claim 4
Dependent Claim
18 words
The screen of claim 1 in which said coating of aluminum ink is covered by a protective coating.
Claim 5
Dependent Claim
15 words
The screen of claim 3 in which said protective coating is a clear acrylic varnish.
Claim 6
Dependent Claim
16 words
The front projection screen of claim 3 in which said protective coating has a gloss finish.
Claim 7
Dependent Claim
37 words
The front projection screen of claim 1 in which said coating of aluminum ink contains aluminum powders carried in an acrylic varnish with said aluminum powders of a size to pass through a 160 mesh monofilament screen.
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) | 1983-05-06 | 1983-11-05 | 1984-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-06 | 1987-11-05 | 1988-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-06 | 1991-11-05 | 1992-05-06 | $7700.00 | Window Closed / Lapsed |