Patent US2929791A successfully refreshed from Google Patents.
US2929791A
Expired / Lapsed
US
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Crayon for detection of g agents
Assignee: Individual
•
Filing: 1959-04-06
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Granted: 1960-03-22
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Expires: 1979-04-06
Abstract
No abstract record available.
Inventors
- 👤 Robert W Pfeil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:10
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; Y; Y10; Y10T; Y10T436/00; Y10T436/16; Y10T436/163333; Y10T436/19; Y10T436/196666
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A COMPOSITION FOR DETECTING THE PRESENCE OF G AGENTS IN THE AIR CONSISTING ESSENTIALLY OF THE FOLLOWING INGREDIENTS IN SUBSTANTIALLY THE FOLLOWING PROPORTIONS, DISODIUM DIISONITROSOACETONE .6H20, 20%, ORTHOTOLIDINE, 20%, UREA, 15%, LITHIUM STEARATE, 27%, A COMPOUND SELECTED FROM THE CLASS CONSISTING OF LITHIUM CHLORIDE, CALCIUM CHLORIDE AND LITHIUM BROMIDE, 3%, A COMPOUND SELECTED FROM THE CLASS CONSISTING OF CALCIUM OXIDE AND CALCIUM HYDROXIDE, 15%.
Claim 2
Dependent Claim
64 words
A COMPOSITION FOR DETECTING THE PRESENCE OF G AGENTS IN THE AIR CONSISTING ESSENTIALLY OF THE FOLLOWING INGREDIENTS IN SUBSTANTIALLY THE FOLLOWING PROPORTIONS, DISODIUM DIISONITROSOACETONE .6H20, 20%, ORTHOTOLIDINE, 20%, UREA, 15%, LITHIUM STEARATE, 27%, A COMPOUND SELECTED FROM THE CLASS CONSISTING OF LITHIUM CHLORIDE, CALCIUM CHLORIDE AND LITHIUM BROMIDE, 3%, A COMPOUND SELECTED FROM THE CLASS CONSISTING OF CALCIUM OXIDE AND CALCIUM HYDROXIDE, 15%.
References Cited (Backward Citations)
US2865719A
Cited
US2867509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |