US2837612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mercury switches
Assignee: AT&T Inc
•
Filing: 1955-02-18
•
Granted: 1958-06-03
•
Expires: 1975-02-18
Abstract
No abstract record available.
Inventors
- 👤 Walter G Gustafson
- 👤 Henry C Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:14
CPC Classifications
H; H04; H04M; H04M19/00; H04M19/02; H01; H01H; H01H1/00; H01H1/06; H01H1/08; H01H29/00; H01H51/00; H01H51/28; H01H51/287; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1289637A
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US1240306A
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US2242636A
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US2136874A
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US2257900A
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US2288811A
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GB576861A
Cited
US2445406A
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US2524340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |