US2979204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Horizontal leaf filter and method of operating the same
Assignee: T Shriver and Co Inc
•
Filing: 1958-12-16
•
Granted: 1961-04-11
•
Expires: 1978-12-16
Abstract
No abstract record available.
Inventors
- 👤 Frank M Yeiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:54
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/01; B01D29/05; B01D29/39; B01D29/41; B01D29/416; B01D29/50; B01D29/52; B01D29/60; B01D29/605; B01D29/62; B01D29/70; B01D29/76; B01D29/78; B01D29/80; B01D29/96
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2843267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |