US2585937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety hat
Assignee: Willson Products Inc
•
Filing: 1949-08-01
•
Granted: 1952-02-19
•
Expires: 1969-08-01
Abstract
No abstract record available.
Inventors
- 👤 Gerald C Johnson
- 👤 Albert A Perelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:07
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/10; A42B3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US389962A
Cited
US708872A
Cited
US1342924A
Cited
US1575251A
Cited
GB328804A
Cited
US2025772A
Cited
US2074568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |