Patent US2324420A successfully refreshed from Google Patents.
US2324420A
Expired / Lapsed
US
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Method of forming helmets
Assignee: Individual
•
Filing: 1942-01-06
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Granted: 1943-07-13
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Expires: 1962-01-06
Abstract
No abstract record available.
Inventors
- 👤 Elmer E Oestrike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:21
CPC Classifications
A; A42; A42C; A42C2/00; A42C2/007; B; B29; B29C; B29C67/00; Y; Y10; Y10S; Y10S264/00; Y10S264/30
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) | 1946-07-12 | 1947-01-11 | 1947-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-07-12 | 1951-01-11 | 1951-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-07-12 | 1955-01-11 | 1955-07-13 | $7700.00 | Window Closed / Lapsed |