Patent US3232408A successfully refreshed from Google Patents.
US3232408A
Expired / Lapsed
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Method for retrieving magnetic roadway signal devices
Assignee: Individual
•
Filing: 1964-09-01
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Granted: 1966-02-01
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Expires: 1984-09-01
Abstract
No abstract record available.
Inventors
- 👤 Edward M Asbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:45
CPC Classifications
E; E01; E01F; E01F9/00; E01F9/60; E01F9/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METHOD FOR RETRIEVING METALLIC SIGNAL DEVICES FROM A ROADWAY SURFACE WHICH COMPRISES THE STEPS OF, PASSING OVER SAID METALLIC SIGNAL DEVICE WITH A ROTATING MAGNETIC FIELD, MAGNETICALLY ENGAGING SAID METALLIC SIGNAL DEVICE TO A PORTION OF SAID ROTATING MEGNETIC FIELD AND LIFTING SAID METALLIC SIGNAL DEVICE FROM SAID ROADWAY SURFACE, TRANSPORTING SAID METALLIC SIGNAL DEVICE ENGAGED TO SAID ROTATING MAGNETIC FIELD TO A LOCATION SPACED ABOVE THE ROADWAY SURFACE, AND DISENGAGING SAID METALLIC SIGNAL DEVICE FROM SAID ROTATING MAGNETIC FIELD AT A LOCATION SPACED ABOVE THE ROADWAY SURFACE.
Claim 2
Independent Claim
89 words
A METHOD FOR RETRIEVING METALLIC SIGNAL DEVICES FROM A ROADWAY SURFACE WHICH COMPRISES THE STEPS OF, PASSING OVER SAID METALLIC SIGNAL DEVICE WITH A ROTATING MAGNETIC FIELD, MAGNETICALLY ENGAGING SAID METALLIC SIGNAL DEVICE TO A PORTION OF SAID ROTATING MEGNETIC FIELD AND LIFTING SAID METALLIC SIGNAL DEVICE FROM SAID ROADWAY SURFACE, TRANSPORTING SAID METALLIC SIGNAL DEVICE ENGAGED TO SAID ROTATING MAGNETIC FIELD TO A LOCATION SPACED ABOVE THE ROADWAY SURFACE, AND DISENGAGING SAID METALLIC SIGNAL DEVICE FROM SAID ROTATING MAGNETIC FIELD AT A LOCATION SPACED ABOVE THE ROADWAY SURFACE.
References Cited (Backward Citations)
GB236221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |