US2798222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective device
Assignee: MSA Safety Inc
•
Filing: 1954-07-13
•
Granted: 1957-07-09
•
Expires: 1974-07-13
Abstract
No abstract record available.
Inventors
- 👤 Robert B Evans
- 👤 John F Byrnes
- 👤 Elmer J Schubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:18
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/18; A42B3/22; A42B3/225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR489730A
Cited
US2167969A
Cited
US2169745A
Cited
US2194492A
Cited
US2238994A
Cited
US2360482A
Cited
US2421427A
Cited
US2718006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-08 | 1961-01-07 | 1961-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-08 | 1965-01-07 | 1965-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-08 | 1969-01-07 | 1969-07-09 | $7700.00 | Window Closed / Lapsed |