Patent US2971195A successfully refreshed from Google Patents.
US2971195A
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Safety helmet
Assignee: MSA Safety Inc
•
Filing: 1958-06-02
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Granted: 1961-02-14
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Expires: 1978-06-02
Abstract
No abstract record available.
Inventors
- 👤 Donald J Voss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:36
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/06; A42B3/10; A42B3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2177145A
Cited
US2197174A
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DE707963C
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US2625683A
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US2793366A
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US2758305A
Cited
US2853708A
Cited
US2879513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-14 | 1964-08-15 | 1965-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-14 | 1968-08-15 | 1969-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-14 | 1972-08-15 | 1973-02-14 | $7700.00 | Window Closed / Lapsed |