US2731107A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1954-05-07
•
Granted: 1956-01-17
•
Expires: 1974-05-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry J Hersey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:57
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/50; B01D29/52; B01D29/60; B01D29/606; B01D29/62; B01D29/64; B01D29/6407; B01D29/6423; B01D29/66; B01D29/665; B01D29/668; B01D29/70; B01D46/00; B01D46/02; B01D46/04; B01D46/66; B01D46/68; B01D46/681; B01D46/70; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0446; B01D2265/00; B01D2265/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE521165C
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US996519A
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GB191509390A
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US1516444A
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GB368731A
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US2391534A
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FR1040053A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |