US2796146A
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US
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Assignee: HERSEY
•
Filing: 1952-11-13
•
Granted: 1957-06-18
•
Expires: 1972-11-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry J Hersey
- 👤 David B Perlis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:52
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/2403; B01D46/2411; B01D29/00; B01D29/01; B01D29/11; B01D29/114; B01D29/62; B01D29/66; B01D29/68; B01D29/682; B01D29/88; B01D29/90; B01D29/908; B01D46/0039; B01D46/0041; B01D46/0046; B01D46/66; B01D46/70; B01D46/71; B01D2201/00; B01D2201/08; B01D2201/081; B01D2201/084
Claims Analysis
Total Claims: 0
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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) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |