US2541799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of feeding chemicals
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
2026-11-01 19:28
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/686; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US461235A
Cited
US842088A
Cited
US1409248A
Cited
US1563849A
Cited
US1762314A
Cited
US1917704A
Cited
DE610316C
Cited
US1995639A
Cited
US2062231A
Cited
US2081794A
Cited
US2112476A
Cited
US2243826A
Cited
US2240164A
Cited
US2311532A
Cited
US2310187A
Cited
US2347201A
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 |