Patent US2595489A successfully refreshed from Google Patents.
US2595489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insert earphone and operative subassembly therefor
Assignee: Brush Development Co
•
Filing: 1945-10-03
•
Granted: 1952-05-06
•
Expires: 1965-10-03
Abstract
No abstract record available.
Inventors
- 👤 Donald E Rutter
- 👤 Harry B Shaper
- 👤 Walter J Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:20
CPC Classifications
H; H04; H04R; H04R17/00; H04R25/00; H04R25/55; H04R2460/00; H04R2460/15
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1947362A
Cited
US2145449A
Cited
US2248837A
Cited
US2284063A
Cited
US2325590A
Cited
US2391924A
Cited
US2367726A
Cited
US2353089A
Cited
US2399513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-06 | 1955-11-05 | 1956-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-06 | 1959-11-05 | 1960-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-06 | 1963-11-05 | 1964-05-06 | $7700.00 | Window Closed / Lapsed |