US3039655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus to charge an earth filter in a pipeline carrying a fluid
Assignee: Individual
•
Filing: 1956-11-08
•
Granted: 1962-06-19
•
Expires: 1976-11-08
Abstract
No abstract record available.
Inventors
- 👤 Pfeuffer Anton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:09
CPC Classifications
C; C12; C12H; C12H1/00; B; B01; B01D; B01D37/00; B01D37/02; B01D39/00; B01D39/02; B01D39/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2195616A
Cited
DE830778C
Cited
US2455130A
Cited
US2631969A
Cited
FR1039490A
Cited
FR1039489A
Cited
US2653802A
Cited
DE926417C
Cited
US2823833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |