US2239946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective helmet
Assignee: Individual
•
Filing: 1939-12-26
•
Granted: 1941-04-29
•
Expires: 1959-12-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas B Upchurch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:27
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/0406; A42B3/06; A42B3/10; A42B3/12; A42B3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-04-28 | 1944-10-28 | 1945-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-04-28 | 1948-10-28 | 1949-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-04-28 | 1952-10-28 | 1953-04-29 | $7700.00 | Window Closed / Lapsed |