US2422735A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1944-02-16
•
Granted: 1947-06-24
•
Expires: 1964-02-16
Abstract
No abstract record available.
Inventors
- 👤 Guardia Louis E La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:36
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/31; B01D29/33; B01D29/62; B01D29/64; B01D29/6407; B01D29/6415
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US431448A
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US628517A
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US652927A
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US776801A
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US839514A
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US967708A
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US939448A
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US1153920A
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US1864019A
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US1867094A
Cited
US1864027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-23 | 1950-12-23 | 1951-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-23 | 1954-12-23 | 1955-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-23 | 1958-12-23 | 1959-06-24 | $7700.00 | Window Closed / Lapsed |