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US2540362A
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Assignee: Individual
•
Filing: 1947-04-16
•
Granted: 1951-02-06
•
Expires: 1967-04-16
Abstract
No abstract record available.
Inventors
- 👤 Fred H Winslow
- 👤 William S Hammond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:26
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/39; B01D29/395; B01D35/00; B01D35/02; B01D35/027; B01D37/00; B01D37/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE122122C
Cited
US1943811A
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US2221210A
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US2207346A
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US2359368A
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US2443087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |