US2501107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Headband
Assignee: United States, WAR, Secretary of
•
Filing: 1944-05-27
•
Granted: 1950-03-21
•
Expires: 1964-05-27
Abstract
No abstract record available.
Inventors
- 👤 Volkmann John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:18
CPC Classifications
H; H04; H04R; H04R5/00; H04R5/033; H04R5/0335; H04R1/00; H04R1/10; H04R1/1016; H04R1/1058; H04R1/1066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE353758C
Cited
US820463A
Cited
US1398958A
Cited
GB237514A
Cited
US2075196A
Cited
US2337953A
Cited
US2353070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |