US2890797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination sampling-testing device
Assignee: MSA Safety Inc
•
Filing: 1955-11-29
•
Granted: 1959-06-16
•
Expires: 1975-11-29
Abstract
No abstract record available.
Inventors
- 👤 Joseph S Matthews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:05
CPC Classifications
G; G01; G01N; G01N30/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1012639A
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US1482433A
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US1865982A
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US2046566A
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US2464921A
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US2483108A
Cited
US2597350A
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US2679158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |