US3025142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means of detecting ammonia and amine vapor
Assignee: Individual
•
Filing: 1959-10-30
•
Granted: 1962-03-13
•
Expires: 1979-10-30
Abstract
No abstract record available.
Inventors
- 👤 Dale D Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:00
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/24; G01N31/00; G01N31/22; Y; Y10; Y10T; Y10T436/00; Y10T436/17; Y10T436/173845; Y10T436/175383
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
42 words
THE METHOD OF DETECTING THE PRESENCE OF AMMONIA AND AMINE VAPOR IN A GASEOUS MEDIUM WHICH CONSISTS OF SUBJECTING SILICA GEL IMPREGNATED WITH TRIKETOHYDRINDENE HYDRATE TO A SAMPLE OF SAID GASEOUS MEDIUM AND SUBSEQUENTLY HEATING SAID SILICA GEL SUFFICIENTLY TO PRODUCE COLORATION.
References Cited (Backward Citations)
GB431809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |