Patent US3253289A successfully refreshed from Google Patents.
US3253289A
Expired / Lapsed
US
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Bridge floor and wear plate therefor
Assignee: Reliance Steel Products Co
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Filing: 1963-04-03
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Granted: 1966-05-31
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Expires: 1983-04-03
Abstract
No abstract record available.
Inventors
- 👤 Harry S Nagin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:04
CPC Classifications
E; E01; E01D; E01D19/00; E01D19/08; E01D19/083; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44641; Y10T24/44769; Y10T24/44923
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A WEAR PLATE FOR APPLICATION TO THE GRATING OF A BRIDGE FLOOR WHEREIN THE GRATING HAS INTERSECTING BEARING BARS AND CROSS BARS, SAID WEAR PLATE COMPRISING A METAL PLATE HAVING A PLURALITY OF SPACED PAIRS OF OPPOSED LUGS THEREON, THE LUGS OF EACH PAIR SLOPING DOWNWARDLY FROM THE PLANE OF THE PLATE AT CONVERGENT ANGLES AND HAVING CONFRONTING FREE LOWER ENDS THAT ARE SPACED FROM EACH OTHER A DISTANCE SUCH AS TO STRADDLE THE TOP EDGE OF A GRATING BAR WHEN THE PLATE IS PLACED OVER THE GRATING, THE AREA OF THE PLATE ABOVE THE PAIRS OF LUGS BEING OPEN TO AFFORD ACCESS TO THE LUGS WHEN THE PLATE IS PLACED
Claim 2
Dependent Claim
111 words
A WEAR PLATE FOR APPLICATION TO THE GRATING OF A BRIDGE FLOOR WHEREIN THE GRATING HAS INTERSECTING BEARING BARS AND CROSS BARS, SAID WEAR PLATE COMPRISING A METAL PLATE HAVING A PLURALITY OF SPACED PAIRS OF OPPOSED LUGS THEREON, THE LUGS OF EACH PAIR SLOPING DOWNWARDLY FROM THE PLANE OF THE PLATE AT CONVERGENT ANGLES AND HAVING CONFRONTING FREE LOWER ENDS THAT ARE SPACED FROM EACH OTHER A DISTANCE SUCH AS TO STRADDLE THE TOP EDGE OF A GRATING BAR WHEN THE PLATE IS PLACED OVER THE GRATING, THE AREA OF THE PLATE ABOVE THE PAIRS OF LUGS BEING OPEN TO AFFORD ACCESS TO THE LUGS WHEN THE PLATE IS PLACED
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |