Patent US3052278A successfully refreshed from Google Patents.
US3052278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Devices for forming grooves in articles
Assignee: AT&T Inc
•
Filing: 1959-02-25
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Granted: 1962-09-04
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Expires: 1979-02-25
Abstract
No abstract record available.
Inventors
- 👤 Francis M Baluck
- 👤 Robert K Campbell
- 👤 Hansen Jan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:44
CPC Classifications
B; B21; B21D; B21D17/00; B21D17/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1514589A
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US1512394A
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US1887434A
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US2312225A
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US2455768A
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US2582249A
Cited
US2686551A
Cited
US2800942A
Cited
US2771117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |