Patent US3203440A successfully refreshed from Google Patents.
US3203440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for feeding chemicals into liquids
Assignee: Tesco Chemicals Inc
•
Filing: 1963-10-08
•
Granted: 1965-08-31
•
Expires: 1983-10-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas E Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:42
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/688; Y; Y10; Y10T; Y10T137/00; Y10T137/4891
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A DEVICE FOR FEEDING CHEMICALS INTO A LIQUID COMPRISING A HOLDER HAVING MEANS FOR RETAINING A SOLID BODY OF SOLUBLE CHEMICAL BEARING COMPOUND AGAINST LATERAL DISPLACEMENT, AND MEANS FOR DIRECTING A JET OF LIQUID
Claim 2
Independent Claim
34 words
A DEVICE FOR FEEDING CHEMICALS INTO A LIQUID COMPRISING A HOLDER HAVING MEANS FOR RETAINING A SOLID BODY OF SOLUBLE CHEMICAL BEARING COMPOUND AGAINST LATERAL DISPLACEMENT, AND MEANS FOR DIRECTING A JET OF LIQUID
References Cited (Backward Citations)
US2538720A
Cited
US2820701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |