US4644907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boiler tubes of enhanced efficiency and method of producing same
Assignee: Individual
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Filing: 1985-11-29
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Granted: 1987-02-24
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Expires: 2005-11-29
Abstract
Abstract A composite boiler tube has a fireside surface and a water-side surface and comprises a metallic tubular member having an outer surface and an inner surface. One of the metallic surfaces has an efficiency enhancing coating adhered thereto and providing the composite tube with the fireside surface or the waterside surface. A method of enhancing the efficiency of a boiler tube which comprises a metallic tubular member having an outer surface and an inner surface includes the step of applying a coating of efficiency enhancing material adhered to one of the metallic tube member surfaces, thus to produce a composite boiler tube.
Inventors
- 👤 Edward H. Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:39
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/04; F16; F16L; F16L58/00; F16L58/02; F16L58/04; F16L58/10; F16L58/1009; F16L58/1054; F22B37/10; Y; Y10; Y10S; Y10S122/00; Y10S122/13
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
87 words
A composite boiler tube having a fireside surface and a waterside surface and comprising a metallic tubular member having an outer surface and an inner surface, at least one of said metallic surfaces having an efficiency enhancing coating adhered thereto and providing said composite tube with one of said fireside surface and said waterside surface, wherein the material of said coating is dichlorodimethylsilane or its fluorocarbon composition version and wherein the radial thickness of said coating is on the order of 1×10 -6 inch (2.54×10 -6 cm).
Claim 2
Dependent Claim
87 words
A composite boiler tube having a fireside surface and a waterside surface and comprising a metallic tubular member having an outer surface and an inner surface, at least one of said metallic surfaces having an efficiency enhancing coating adhered thereto and providing said composite tube with one of said fireside surface and said waterside surface, wherein the material of said coating is dichlorodimethylsilane or its fluorocarbon composition version and wherein the radial thickness of said coating is on the order of 1×10 -6 inch (2.54×10 -6 cm).
Claim 3
Dependent Claim
17 words
A composite tube according to claim 1 wherein said one said metallic surface is said outer surface.
Claim 4
Dependent Claim
17 words
A composite tube according to claim 1 wherein said one said metallic surface is said inner surface.
Claim 5
Dependent Claim
31 words
A composite tube according to claim 1 wherein each said metallic surface has a said efficiency enhancing coating adhered thereto, said coatings providing both said fireside surface and said waterside surface.
Claim 6
Dependent Claim
23 words
A composite tube according to claim 1 wherein said one metallic surface is said outer surface and said coating provides said fireside surface.
Claim 7
Dependent Claim
12 words
A composite tube according to claim 5 wherein said coating is transparent.
Claim 8
Independent Claim
83 words
A method of enhancing the efficiency of a boiler tube comprising a metallic tubular member having an outer surface and an inner surface, said method including the step of applying by vaporization a coating of efficiency enhancing material adhered to one of said surfaces, thus to produce a composite boiler tube, wherein the material of said coating is dichlorodimethylsilane or its fluorocarbon composition version and said coating is applied to a radial thickness on the order of 1×10 -6 inch (2.54×10 -6 cm).
Claim 9
Independent Claim
83 words
A method of enhancing the efficiency of a boiler tube comprising a metallic tubular member having an outer surface and an inner surface, said method including the step of applying by vaporization a coating of efficiency enhancing material adhered to one of said surfaces, thus to produce a composite boiler tube, wherein the material of said coating is dichlorodimethylsilane or its fluorocarbon composition version and said coating is applied to a radial thickness on the order of 1×10 -6 inch (2.54×10 -6 cm).
Claim 10
Dependent Claim
26 words
A method according to claim 7 including the further step of applying a said coating of efficiency enhancing material adhered to the other of said surfaces.
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) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |