US2429608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multichannel pulse communication system
Assignee: International Standard Electric Corp
•
Filing: 1943-02-16
•
Granted: 1947-10-28
•
Expires: 1963-02-16
Abstract
No abstract record available.
Inventors
- 👤 Chatterjea Prafulla Kumar
- 👤 Houghton Leslie Wilfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:00
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/06; H04J7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US913363A
Cited
US1530666A
Cited
US1512361A
Cited
US1742902A
Cited
US1928093A
Cited
US2007809A
Cited
US2055309A
Cited
US1979463A
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US2082877A
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US2146876A
Cited
US2257562A
Cited
US2048081A
Cited
US2172354A
Cited
US2057773A
Cited
US2227108A
Cited
US2113214A
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US2204375A
Cited
US2352634A
Cited
US2213941A
Cited
US2272070A
Cited
US2268081A
Cited
US2282046A
Cited
GB555993A
Cited
US2395467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-27 | 1951-04-28 | 1951-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-27 | 1955-04-28 | 1955-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-27 | 1959-04-28 | 1959-10-28 | $7700.00 | Window Closed / Lapsed |