Patent US2541798A successfully refreshed from Google Patents.
US2541798A
Expired / Lapsed
US
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Chemical feeder
Assignee: Individual
•
Filing: 1947-05-22
•
Granted: 1951-02-13
•
Expires: 1967-05-22
Abstract
No abstract record available.
Inventors
- 👤 Eugene B White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:41
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/686; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US445909A
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US1946474A
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US1905244A
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US1922920A
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US1963522A
Cited
US2009306A
Cited
US2065583A
Cited
US2260936A
Cited
US2381589A
Cited
US2461334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |