Patent US2303497A successfully refreshed from Google Patents.
US2303497A
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US
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Duplex metal body
Assignee: AT&T Inc
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Filing: 1941-05-09
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Granted: 1942-12-01
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Expires: 1961-05-09
Abstract
No abstract record available.
Inventors
- 👤 Howard T Reeve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:25
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/22; B23K20/233; H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/023; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/929; Y10S428/9335; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12458; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12868; Y10T428/12875; Y10T428/12896
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-11-30 | 1946-06-01 | 1946-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-11-30 | 1950-06-01 | 1950-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-11-30 | 1954-06-01 | 1954-12-01 | $7700.00 | Window Closed / Lapsed |