US2855604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective headgear
Assignee: MSA Safety Inc
•
Filing: 1954-11-12
•
Granted: 1958-10-14
•
Expires: 1974-11-12
Abstract
No abstract record available.
Inventors
- 👤 Harry W Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:56
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/18; A42B3/22; A42B3/227; A42B3/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US780782A
Cited
US1749998A
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US1912551A
Cited
US2181180A
Cited
US2569451A
Cited
US2686919A
Cited
US2604630A
Cited
US2665422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |