US3877874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for detection and droplet measurement of S-(2-diisopropylaminoethyl)O-ethyl methylphosphonothioate chemical warfare agent with 1,3,5 trinitrobenzene
Assignee: United States Department of the Army
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Filing: 1969-10-17
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Granted: 1975-04-15
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Expires: 1989-10-17
Abstract
Abstract A method for the detection and droplet measurement of an undyed chemical warfare agent comprising the impregnation of paper cards with a solution of 1,3,5-trinitrobenzene (TNB), contacting the impregnated paper cards with the agent and photographing the cards using microfilm to provide input for an Automatic Spot Counter Sizer.
Inventors
- 👤 Howard E Thompson
- 👤 Frank M Noonan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:32
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/30; C07F9/32; C07F9/3258; C07F9/3264; C07F9/38; C07F9/40; C07F9/4071; C07F9/4075; Y; Y10; Y10T; Y10T436/00; Y10T436/16; Y10T436/163333
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
69 words
A METHOD FOR THE DETECTION AND DROPLET MEASUREMEMT OF S-(2=DIISOPROPYLAMINOETHYL)O-ETHYL MEHYLPHOSPHONOTHIOATE CHEMICAL WAREFARE AGENT COMPRISING THE TREATMENT OF A PAPER CARD STOCK WITH ASOLUTION OF 1,3,5-TRINITRIOBENZENE DISSOLVED IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF METHANOL, ETHANOL, WATER, BENZENE, ACETIC ACID, DIMETHYLSULFOXIDE, ACETIC ANHYDRIDE THE DRIED MIXTURES THEREOF, DRYING THE SENSITIZED PAPER CONTACTING THE DRIED SENSITIZED PAPER WITH THE AGENT AND PHOTOGRAPHING THE PAPER CARD STOCK FOR EVALUTION.
Claim 2
Independent Claim
69 words
A METHOD FOR THE DETECTION AND DROPLET MEASUREMEMT OF S-(2=DIISOPROPYLAMINOETHYL)O-ETHYL MEHYLPHOSPHONOTHIOATE CHEMICAL WAREFARE AGENT COMPRISING THE TREATMENT OF A PAPER CARD STOCK WITH ASOLUTION OF 1,3,5-TRINITRIOBENZENE DISSOLVED IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF METHANOL, ETHANOL, WATER, BENZENE, ACETIC ACID, DIMETHYLSULFOXIDE, ACETIC ANHYDRIDE THE DRIED MIXTURES THEREOF, DRYING THE SENSITIZED PAPER CONTACTING THE DRIED SENSITIZED PAPER WITH THE AGENT AND PHOTOGRAPHING THE PAPER CARD STOCK FOR EVALUTION.
Claim 3
Dependent Claim
24 words
A method in accordance with claim 1 wherein the paper card stock is treated with a solution comprising 3 percent by weight of 1,3,5-trinitrobenzene.
Claim 4
Dependent Claim
28 words
A method in accordance with claim 1 wherein the paper card stock is photographed using microfilm in order to provide input for an Automatic Spot Counter and Sizer.
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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |