US3140644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-skid grating
Assignee: Individual
•
Filing: 1962-05-28
•
Granted: 1964-07-14
•
Expires: 1982-05-28
Abstract
No abstract record available.
Inventors
- 👤 Royal B Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:32
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/42; E04C2/427
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A NON-SKID GRATING, COMPRISING: A UNITARY SHEET ELEMENT HAVING A PLURALITY OF SPACED, LONGITUDINAL RETURN FOLDED RIBS; ROWS OF LONGITUDINALLY SPACED, SUBSTANTIALLY COPLANAR PLATFORM PORTIONS BETWEEN SAID RIBS AND HAVING OPENINGS THEREBETWEEN; SAID RIBS HAVING UPWARDLY PROJECTING TABS AT THE ENDS OF SAID OPENINGS; AND SAID PLATFORM PORTIONS HAVING UPWARDLY PROJECTING TABS AT THE SIDES THEREOF NORMAL TO SAID FIRST MENTIONED TABS AND CONSTITUTING THEREWITH A RETICULATED ARRAY OF NON-SKID ELEMENTS.
Claim 2
Dependent Claim
71 words
A NON-SKID GRATING, COMPRISING: A UNITARY SHEET ELEMENT HAVING A PLURALITY OF SPACED, LONGITUDINAL RETURN FOLDED RIBS; ROWS OF LONGITUDINALLY SPACED, SUBSTANTIALLY COPLANAR PLATFORM PORTIONS BETWEEN SAID RIBS AND HAVING OPENINGS THEREBETWEEN; SAID RIBS HAVING UPWARDLY PROJECTING TABS AT THE ENDS OF SAID OPENINGS; AND SAID PLATFORM PORTIONS HAVING UPWARDLY PROJECTING TABS AT THE SIDES THEREOF NORMAL TO SAID FIRST MENTIONED TABS AND CONSTITUTING THEREWITH A RETICULATED ARRAY OF NON-SKID ELEMENTS.
References Cited (Backward Citations)
US1154254A
Cited
US1594609A
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US1875188A
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US2558185A
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US2781703A
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US2828843A
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US3046617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |