US2697307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making sealed tubes for five piece dry reed switches
Assignee: AT&T Inc
•
Filing: 1952-05-20
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Granted: 1954-12-21
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Expires: 1972-05-20
Abstract
No abstract record available.
Inventors
- 👤 Walter H Diehl
- 👤 Allston L House
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:17
CPC Classifications
H; H01; H01H; H01H11/00; H01H11/005; Y; Y10; Y10S; Y10S65/00; Y10S65/12; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2511914A
Cited
US842007A
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US1653381A
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DE542173C
Cited
US2391573A
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US2575746A
Cited
US2523903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |