Patent US5961499A successfully refreshed from Google Patents.
Patent US3530994A successfully refreshed from Google Patents.
US3530994A
Expired / Lapsed
US
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Core receiver table
Assignee: ROBERTS Corp A MI CORP
•
Filing: 1968-07-23
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Granted: 1970-09-29
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Expires: 1988-07-23
Abstract
No abstract record available.
Inventors
- 👤 Hugh A Bourassa
- 👤 Arthur H Emser
- 👤 Edward J Ptak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:39
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733488A
Cited
US1982804A
Cited
US2311942A
Cited
GB568704A
Cited
GB639696A
Cited
US2754708A
Cited
US3103353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |