US2845989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for sensing misaligned pipe seam and twisting same
Assignee: AT&T Inc
•
Filing: 1953-12-08
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Granted: 1958-08-05
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Expires: 1973-12-08
Abstract
No abstract record available.
Inventors
- 👤 Waldemar C Ewaldson
- 👤 Cecil A Hallam
- 👤 Henry C Slechta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:13
CPC Classifications
H; H01; H01B; H01B13/00; H01B13/22; H01B13/26; H01B13/2613; B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/20; B21C37/205
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1997272A
Cited
US2130586A
Cited
US2268368A
Cited
US2526723A
Cited
US2499853A
Cited
US2557046A
Cited
US2582963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |