US3421855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the automatic determination and/or control of the hydroxide:nitrite ratio in nitrite solutions
Assignee: Stamicarbon BV
•
Filing: 1964-12-01
•
Granted: 1969-01-14
•
Expires: 1984-12-01
Abstract
No abstract record available.
Inventors
- 👤 Gerrit Kateman
- 👤 Kurt Von Morgen
- 👤 Joannes B G Wijenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:46
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/16; C; C01; C01B; C01B21/00; C01B21/082; C01B21/14; C01B21/1409; C01B21/1427; Y; Y10; Y10T; Y10T436/00; Y10T436/17; Y10T436/173076; Y10T436/20; Y10T436/203332
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |