Patent US3817705A successfully refreshed from Google Patents.
US3817705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for the indication of nitrite
Assignee: dt GmbH
•
Filing: 1972-08-10
•
Granted: 1974-06-18
•
Expires: 1992-08-10
Abstract
Abstract DETECTION OF NITRITE IONS, COMPRISING AN ABSORBENT SUPPORT CARRIER IMPREGNATED WITH PARTICULAR DIAZOTIZABLE AMINES A COMPONENT COUPLING WITH DIAZONIUM SALTS, AND AN ACID.
Inventors
- 👤 A Stein
- 👤 W Baumer
- 👤 D Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:49
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/521; G01N33/523; C; C12; C12Q; C12Q1/00; C12Q1/02; C12Q1/04; C12Q1/12; Y; Y10; Y10T; Y10T436/00; Y10T436/17; Y10T436/173076
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |