US2419004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tank structure for liquid treatment
Assignee: Graver Energy Systems Inc
•
Filing: 1944-06-09
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Granted: 1947-04-15
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Expires: 1964-06-09
Abstract
No abstract record available.
Inventors
- 👤 Lawrence W Bicker
- 👤 Edward W Welp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:38
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/0012; B01D21/0018; B01D21/0039; B01D21/0042; B01D21/02; B01D21/04; B01D21/06; B01D21/08; B01D21/24; B01D21/2405; B01D21/2427; B01D21/2433
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US806214A
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FR599176A
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US1900809A
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US2073784A
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US2263167A
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US2076529A
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US2245588A
Cited
US2245589A
Cited
US2348123A
Cited
US2355069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-14 | 1950-10-14 | 1951-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-14 | 1954-10-14 | 1955-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-14 | 1958-10-14 | 1959-04-15 | $7700.00 | Window Closed / Lapsed |