US2828863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid filters
Assignee: Komline Sanderson Engineering Corp
•
Filing: 1956-03-12
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Granted: 1958-04-01
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Expires: 1976-03-12
Abstract
No abstract record available.
Inventors
- 👤 Emil J Van Lier
- 👤 Frank R Gensicke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:27
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/50; B01D29/52; F; F16; F16K; F16K15/00; F16K15/14; F16K15/148; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0438; B01D2201/34; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7842; Y10T137/7879; Y10T137/7888; Y10T137/789; Y10T137/7891
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US280212A
Cited
US2734636A
Cited
US2575900A
Cited
US2507125A
Cited
US2576810A
Cited
GB697816A
Cited
US2743737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |