US2621671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic titrimeter
Assignee: Leeds and Northrup Co
•
Filing: 1944-11-21
•
Granted: 1952-12-16
•
Expires: 1964-11-21
Abstract
No abstract record available.
Inventors
- 👤 Edgar L Eckfeldt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:32
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/16; G01N31/166; G01N27/00; G01N27/26; G01N27/416; G01N27/42; G01N27/44; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/034; Y10T137/2496; Y10T137/2499; Y10T137/2509; Y10T436/00; Y10T436/11; Y10T436/115831; Y10T436/116664
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1001589A
Cited
US1530833A
Cited
GB282170A
Cited
US2024819A
Cited
DE692099C
Cited
US2206026A
Cited
US2319196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |