US2792199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust collector
Assignee: MSA Safety Inc
•
Filing: 1955-12-13
•
Granted: 1957-05-14
•
Expires: 1975-12-13
Abstract
No abstract record available.
Inventors
- 👤 Earl M Becker
- 👤 Raymond E Brochetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:42
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/01; E21B21/015; B; B23; B23Q; B23Q11/00; B23Q11/0042; B23Q11/0053
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US895228A
Cited
US1057568A
Cited
US1131009A
Cited
GB209865A
Cited
DE589558C
Cited
US1981570A
Cited
US2716019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |