Patent US4481422A successfully refreshed from Google Patents.
US4481422A
Expired / Lapsed
US
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Intrusion detecting camouflage fluorescent coating
Assignee: United States Department of the Army
•
Filing: 1971-05-21
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Granted: 1984-11-06
•
Expires: 1991-05-21
Abstract
Abstract A camouflage luminescent composition comprising by weight: 52 to 54% of a phosphor, 1 to 3% of a pyrogenic colloidal silica; 0 to 3% of a raw umber colorant; 8 to 15% of an organic resin binder; 23 to 46% of a aromatic hydrocarbon solvent, and a method of use thereof.
Inventors
- 👤 Arthur P. deMarco
- 👤 Gerald E. Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:09
CPC Classifications
F; F41; F41H; F41H9/00; C; C09; C09K; C09K11/00; C09K11/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
A method of detecting an ambush comprising the spraying of a composition consisting of: ______________________________________
Ingredients % by Weight
______________________________________
manganese activated
52 to 54
ortho zinc silicate
pyrogenic colloidal silica
1 to 3
raw umber colorant
0 to 3
organic resin binder
8 to 15
hydrocarbon solvent
33 to 46
______________________________________ over a terrain in an amount of 0.49 to 3.90 grams of dry coating per square foot of terrain and subsequently subjecting the coated terrain to a detector light comprising multiple mercury vapor lamps which provide a short wave, non-visible ultraviolet radiation to excite the coated terrain, whereby the coated terrain emits a certain amount of visual radiation which is measured, to determine whether there has been any disturbance of the terrain.
Claim 2
Independent Claim
124 words
A method of detecting an ambush comprising the spraying of a composition consisting of: ______________________________________
Ingredients % by Weight
______________________________________
manganese activated
52 to 54
ortho zinc silicate
pyrogenic colloidal silica
1 to 3
raw umber colorant
0 to 3
organic resin binder
8 to 15
hydrocarbon solvent
33 to 46
______________________________________ over a terrain in an amount of 0.49 to 3.90 grams of dry coating per square foot of terrain and subsequently subjecting the coated terrain to a detector light comprising multiple mercury vapor lamps which provide a short wave, non-visible ultraviolet radiation to excite the coated terrain, whereby the coated terrain emits a certain amount of visual radiation which is measured, to determine whether there has been any disturbance of the terrain.
Claim 3
Dependent Claim
22 words
A method in accordance with claim 1 wherein the resin binder is selected from the group consisting of methyl methacrylate and polyisobutylene.
Claim 4
Dependent Claim
21 words
A method in accordance with claim 2 wherein the hydrocarbon solvent is selected from the group consisting of toluol and xylol.
Claim 5
Dependent Claim
15 words
A method in accordance with claim 3 wherein the coated terrain is a railway bed.
Claim 6
Dependent Claim
16 words
A method in accordance with claim 1 wherein the raw umber colorant is 1.46% by weight.
Claim 7
Dependent Claim
16 words
A method in accordance with claim 1 wherein the raw umber colorant is 2.93% by weight.
References Cited (Backward Citations)
US2841562A
Cited
US2905572A
Cited
US3535265A
Cited
US3448268A
Cited
US3631434A
Cited
US3631434B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-06 | 1988-05-07 | 1988-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-06 | 1992-05-07 | 1992-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-06 | 1996-05-07 | 1996-11-06 | $7700.00 | Window Closed / Lapsed |