US2559651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone subset
Assignee: International Standard Electric Corp
•
Filing: 1944-09-23
•
Granted: 1951-07-10
•
Expires: 1964-09-23
Abstract
No abstract record available.
Inventors
- 👤 Ernest S Mclarn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:42
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1579614A
Cited
US1794831A
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GB344677A
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US2094283A
Cited
GB515354A
Cited
US2226734A
Cited
US2279713A
Cited
US2297488A
Cited
US2312970A
Cited
US2348592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |