Patent US3740125A successfully refreshed from Google Patents.
Patent US2601137A successfully refreshed from Google Patents.
US2601137A
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Filtration plant flow control responsive to demand
Assignee: Neyrpic SA
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Filing: 1949-03-22
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Granted: 1952-06-17
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Expires: 1969-03-22
Abstract
No abstract record available.
Inventors
- 👤 Pierre P E Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:11
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/02; B01D24/20; B01D24/22; B01D24/007; B01D24/48; B01D24/4869; B01D36/00; B01D36/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US373257A
Cited
US409611A
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US603483A
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US713896A
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US799180A
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US917381A
Cited
US1062981A
Cited
US2238108A
Cited
US2451029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |