US2976397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-controlled strand annealer
Assignee: AT&T Inc
•
Filing: 1957-01-30
•
Granted: 1961-03-21
•
Expires: 1977-01-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Benjamin C Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:59
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D9/62; C21D1/00; C21D1/34; C21D1/40; C21D9/561
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US496208A
Cited
US1347917A
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US1626713A
Cited
US2457870A
Cited
US2465093A
Cited
US2589283A
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US2726971A
Cited
US2658982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |