US2881443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Face shield device
Assignee: B F MCDONALD Co
•
Filing: 1955-11-04
•
Granted: 1959-04-14
•
Expires: 1975-11-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Luther Paul Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:28
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/02; A61F9/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190200085A
Cited
US1398958A
Cited
US2016775A
Cited
US2213118A
Cited
US2272833A
Cited
US2395297A
Cited
US2461605A
Cited
US2710965A
Cited
US2729820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |