US2675758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical feeder
Assignee: Infilco Inc
•
Filing: 1949-01-06
•
Granted: 1954-04-20
•
Expires: 1969-01-06
Abstract
No abstract record available.
Inventors
- 👤 Walter J Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:30
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/0009; F04B43/0054; F04B43/0081; F04B43/009; F04B43/02; F04B43/06; F04B43/073; F04B9/00; F04B9/08; F04B9/12; F04B9/123; F04B9/127; Y; Y10; Y10S; Y10S100/00; Y10S100/903; Y10S100/907
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US278068A
Cited
US1447074A
Cited
US1982966A
Cited
US2130521A
Cited
US2145566A
Cited
US2157970A
Cited
US2260306A
Cited
US2185784A
Cited
US2308974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |