Patent US2928496A successfully refreshed from Google Patents.
US2928496A
Expired / Lapsed
US
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Combined separator and baffle
Assignee: MSA Safety Inc
•
Filing: 1956-11-30
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Granted: 1960-03-15
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Expires: 1976-11-30
Abstract
No abstract record available.
Inventors
- 👤 John H Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:58
CPC Classifications
A; A62; A62B; A62B23/00; Y; Y10; Y10S; Y10S55/00; Y10S55/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US58393A
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US378188A
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US2735507A
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US1521872A
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US1538150A
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US1850101A
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US2153437A
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US2289894A
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US2232065A
Cited
FR864235A
Cited
US2577606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |