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US2981817A
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Assignee: Basic Products Corp
•
Filing: 1958-08-20
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Granted: 1961-04-25
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Expires: 1978-08-20
Abstract
No abstract record available.
Inventors
- 👤 Herman C Frentzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:38
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/60; H01H33/66; H01H33/666; H01H1/00; H01H1/0015
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB566777A
Cited
US1541857A
Cited
US1580715A
Cited
US2003910A
Cited
US2559055A
Cited
US2675435A
Cited
US2838636A
Cited
US2838637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |