Patent US3775355A successfully refreshed from Google Patents.
Patent US3243573A successfully refreshed from Google Patents.
US3243573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railroad heater
Assignee: RTX Corp
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Filing: 1965-06-14
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Granted: 1966-03-29
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Expires: 1985-06-14
Abstract
No abstract record available.
Inventors
- 👤 Walter G Weisse
- 👤 Philip F Famiglietti
- 👤 Peter J Vozzola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:54
CPC Classifications
E; E01; E01B; E01B7/00; E01B7/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
AN ELECTRICAL HEATER FOR A RAILROAD SWITCH TRACK WHICH TRACK HAS A RAIL HEAD, A SUPPORT FLANGE MEMBER AND A VERTICAL TRANSVERSE WEB JOINING THE RAIL HEAD TO THE SUPPORT FLANGE MEMBER, SAID HEATER INCLUDING A RIGID ELONGATED RELATIVELY THIN BODY PORTION FORMED FROM A PLURALITY OF FLAT LAYERS OF GLASS FABRIC REINFORCED PLASTIC CONSISTING OF AT LEAST ONE RESIN BEING SELECTED FROM THE GROUP CONSISTING OF SILICONE, EPOXY AND POLYESTER, AN ELECTRICAL RESISTIVE ELEMENT HAVING A WATT DENSITY IN THE RANGE OF 8 TO 18 WATTS PER SQUARE INCH MOUNTED BETWEEN SAID LAYERS OF SAID GLASS FABRIC REINFORCED PLASTIC AND SPACED FROM SAID VERTICAL TRANSVERSE WEB, THERMOSETTING ADHESIVE MEANS BONDING SAID GLASS FABRIC REINFORCING PLAST TO SAID VERTICAL TRANSVERSE WEB, SAID ADHESIVE MEANS AND SAID GLASS FABRIC REINFORCED PLASTIC BEING CHARACTERIZED AS BEING WEATHER, CORROSION AND EROSION RESISTANT, AN ELECTRICAL POWER SOURCE AND MEANS FOR CONNECTING SAID ELECTRICAL RESISTIVE ELEMENT TO SAID ELECTRICAL POWER SOURCE.
Claim 2
Dependent Claim
156 words
AN ELECTRICAL HEATER FOR A RAILROAD SWITCH TRACK WHICH TRACK HAS A RAIL HEAD, A SUPPORT FLANGE MEMBER AND A VERTICAL TRANSVERSE WEB JOINING THE RAIL HEAD TO THE SUPPORT FLANGE MEMBER, SAID HEATER INCLUDING A RIGID ELONGATED RELATIVELY THIN BODY PORTION FORMED FROM A PLURALITY OF FLAT LAYERS OF GLASS FABRIC REINFORCED PLASTIC CONSISTING OF AT LEAST ONE RESIN BEING SELECTED FROM THE GROUP CONSISTING OF SILICONE, EPOXY AND POLYESTER, AN ELECTRICAL RESISTIVE ELEMENT HAVING A WATT DENSITY IN THE RANGE OF 8 TO 18 WATTS PER SQUARE INCH MOUNTED BETWEEN SAID LAYERS OF SAID GLASS FABRIC REINFORCED PLASTIC AND SPACED FROM SAID VERTICAL TRANSVERSE WEB, THERMOSETTING ADHESIVE MEANS BONDING SAID GLASS FABRIC REINFORCING PLAST TO SAID VERTICAL TRANSVERSE WEB, SAID ADHESIVE MEANS AND SAID GLASS FABRIC REINFORCED PLASTIC BEING CHARACTERIZED AS BEING WEATHER, CORROSION AND EROSION RESISTANT, AN ELECTRICAL POWER SOURCE AND MEANS FOR CONNECTING SAID ELECTRICAL RESISTIVE ELEMENT TO SAID ELECTRICAL POWER SOURCE.
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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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |