Patent US3377641A successfully refreshed from Google Patents.
US3377641A
Expired / Lapsed
US
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Magnetic broom
Assignee: ROBERT J MCGREGOR
•
Filing: 1965-04-28
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Granted: 1968-04-16
•
Expires: 1985-04-28
Abstract
No abstract record available.
Inventors
- 👤 Robert J Mcgregor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:23
CPC Classifications
A; A47; A47L; A47L13/00; A47L13/10; A47L13/40; A47L13/41; B; B03; B03C; B03C1/00; B03C1/02; B03C1/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2415730A
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GB593939A
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US2426795A
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US2693279A
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CH304343A
Cited
FR1252454A
Cited
FR1285273A
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US3206783A
Cited
FR1365411A
Cited
US3337892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |