US2457554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helmet
Assignee: Individual
•
Filing: 1946-03-15
•
Granted: 1948-12-28
•
Expires: 1966-03-15
Abstract
No abstract record available.
Inventors
- 👤 Harry C Harding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:18
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/28; A42B3/288; A62; A62B; A62B18/00; A62B18/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |