US3121825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically conductive floor covering for use in explosive hazard areas
Assignee: Individual
•
Filing: 1959-10-14
•
Granted: 1964-02-18
•
Expires: 1979-10-14
Abstract
No abstract record available.
Inventors
- 👤 Moroni T Abegg
- 👤 Owen D Bottler
- 👤 Jack D Deligans
- 👤 Forrest S Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:58
CPC Classifications
H; H05; H05F; H05F3/00; H05F3/02; H05F3/025; E; E04; E04F; E04F15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
AN ELECTRICALLY CONDUCTIVE FLOOR COVERING STRUCTURE FOR USE IN EXPLOSIVE HAZARD AREAS COMPRISING A HARD SUBSTANTIALLY SMOOTH SUBFLOOR AREA, A CONTINUOUS SHEET OF A LOW RESISTIVITY ELECTRICALLY CONDUCTIVE METALLIC MATERIAL PROVIDED WITH AN EXTERIOR GROUND CONNECTION AND BONDED UNIFORMLY WITH ONE SURFACE IN CONTACT WITH SAID SUBFLOOR AREA, AND A UNIFORM THICKNESS LAYER OF A COMPOSITE ELECTRICALLY CONDUCTIVE COMPOSITION BONDED TO THE SECOND SURFACE OF SAID SHEET OF ELECTRICALLY CONDUCTIVE MATERIAL, SAID COMPOSITION COMPRISING A CURED ADMIXTURE OF AN EPOXY RESIN, A CURING AGENT FOR SAID EPOXY RESIN, AND COMMINUTED ALUMINUM METAL HAVING THE NORMAL OXIDE COATING THEREON IN AMOUNTS PROVIDING AN ELECTRICAL RESISTANCE IN THE RANGE OF 25,000 TO 250,000 OHMS AS MEASURED BETWEEN A TWO AND ONE HALF INCH DIAMETER STEEL PLUG IN CONTACT WITH THE SURFACE THEREOF AND SAID SHEET OF METALLIC MATERIAL.
Claim 2
Dependent Claim
136 words
AN ELECTRICALLY CONDUCTIVE FLOOR COVERING STRUCTURE FOR USE IN EXPLOSIVE HAZARD AREAS COMPRISING A HARD SUBSTANTIALLY SMOOTH SUBFLOOR AREA, A CONTINUOUS SHEET OF A LOW RESISTIVITY ELECTRICALLY CONDUCTIVE METALLIC MATERIAL PROVIDED WITH AN EXTERIOR GROUND CONNECTION AND BONDED UNIFORMLY WITH ONE SURFACE IN CONTACT WITH SAID SUBFLOOR AREA, AND A UNIFORM THICKNESS LAYER OF A COMPOSITE ELECTRICALLY CONDUCTIVE COMPOSITION BONDED TO THE SECOND SURFACE OF SAID SHEET OF ELECTRICALLY CONDUCTIVE MATERIAL, SAID COMPOSITION COMPRISING A CURED ADMIXTURE OF AN EPOXY RESIN, A CURING AGENT FOR SAID EPOXY RESIN, AND COMMINUTED ALUMINUM METAL HAVING THE NORMAL OXIDE COATING THEREON IN AMOUNTS PROVIDING AN ELECTRICAL RESISTANCE IN THE RANGE OF 25,000 TO 250,000 OHMS AS MEASURED BETWEEN A TWO AND ONE HALF INCH DIAMETER STEEL PLUG IN CONTACT WITH THE SURFACE THEREOF AND SAID SHEET OF METALLIC MATERIAL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |