US2996189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter screen installation
Assignee: X-Port Oils Inc
•
Filing: 1959-10-22
•
Granted: 1961-08-15
•
Expires: 1979-10-22
Abstract
No abstract record available.
Inventors
- 👤 Philip C Salterbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:31
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/01; B01D29/05; B01D29/50; B01D29/52; B01D29/56; B01D29/96; B01D2201/00; B01D2201/28; B01D2201/287; Y; Y10; Y10S; Y10S55/00; Y10S55/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CH30008A
Cited
US1510058A
Cited
US2297729A
Cited
US2468249A
Cited
US2540362A
Cited
US2758342A
Cited
US2862650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |