US2516592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for displaying emergency listings on telephones
Assignee: Individual
•
Filing: 1947-12-30
•
Granted: 1950-07-25
•
Expires: 1967-12-30
Abstract
No abstract record available.
Inventors
- 👤 Theodore L Richter
- 👤 Ralph F Lescovich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:23
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/23
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US578589A
Cited
US592968A
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US621589A
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US683888A
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US1378774A
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US1546557A
Cited
US1765445A
Cited
US1949447A
Cited
US2088688A
Cited
US2175840A
Cited
US2214030A
Cited
US2268248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |