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US2642501A
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Assignee: HALL
•
Filing: 1950-03-24
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Granted: 1953-06-16
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Expires: 1970-03-24
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Hall
- 👤 Harry B Dyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:29
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/66; H04M1/667; H04M1/67
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1194959A
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US1132700A
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US1267516A
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US1421493A
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US1739889A
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US1762746A
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US1812984A
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US1899445A
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US2372262A
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US2394275A
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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) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |