US2444818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Announcing machine and system
Assignee: Individual
•
Filing: 1945-02-09
•
Granted: 1948-07-06
•
Expires: 1965-02-09
Abstract
No abstract record available.
Inventors
- 👤 John L Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:36
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/42; H04M3/487
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1765554A
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US1530363A
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US2005788A
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US2067098A
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US2239094A
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US2284008A
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US2362918A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-06 | 1952-01-05 | 1952-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-06 | 1956-01-05 | 1956-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-06 | 1960-01-05 | 1960-07-06 | $7700.00 | Window Closed / Lapsed |