Patent US2578636A successfully refreshed from Google Patents.
US2578636A
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US
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Assignee: Equipment Dev Co Inc
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Filing: 1948-03-17
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Granted: 1951-12-11
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Expires: 1968-03-17
Abstract
No abstract record available.
Inventors
- 👤 Edmund G Smith
- 👤 Otell M Cocchiarella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:52
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/20; B01D29/00; B01D29/11; B01D29/114; B01D29/50; B01D29/52; B01D29/62; B01D29/70; B01D29/72; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0446
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1169725A
Cited
US1263226A
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US1359162A
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US1591229A
Cited
FR579326A
Cited
US1724436A
Cited
US1642673A
Cited
US1843639A
Cited
US2392666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |