Patent US4830101A successfully refreshed from Google Patents.
US4830101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum heat exchanger and method for producing aluminum heat exchanger
Assignee: Nihon Parkerizing Co Ltd
•
Filing: 1986-04-29
•
Granted: 1989-05-16
•
Expires: 2006-04-29
Abstract
Abstract A heat exchanger has special usage such as an evaporator of an automotive air conditioner. This heat exchanger can improve wettability and can reduce a scattering of condensed water. This heat exchanger is treated by a special chemical conversion treatment so that this heat exchanger has two layers of coating on the surface thereof. One of the two layers is a chemical conversion coating formed on the surface of the heat exchanger. The other one is a resin coating formed over the chemical conversion coating. The chemical conversion coating is treated by immersing the heat exchanger into a water solution. The resin coating is also treated by immersing the heat exchanger having the chemical conversion coating into a water solution of organic high polymer material.
Inventors
- 👤 Toshio Ohara
- 👤 Toshio Takahashi
- 👤 Masayoshi Nishikawa
- 👤 Tutomu Niwa
- 👤 Takao Ogino
- 👤 Ryosuke Sako
- 👤 Hideaki Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:01
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; B; B05; B05D; B05D7/00; B05D7/14; B05D7/16; C; C09; C09D; C09D4/00; F28F13/00; F28F13/18; F28F19/00; F28F19/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
78 words
Aluminum heat exchanger comprising: a tube made of aluminum, a plurality of fins made of aluminum, a chemical conversion coating formed on a surface of the aluminum base material which forms at least one of said tube and said fin, and a resin coating of an organic high polymer, which reacts with said chemical conversion coating, include silica of an amount less than 10 g/l and is cationic in a water solution, formed over said chemical conversion coating.
Claim 2
Dependent Claim
78 words
Aluminum heat exchanger comprising: a tube made of aluminum, a plurality of fins made of aluminum, a chemical conversion coating formed on a surface of the aluminum base material which forms at least one of said tube and said fin, and a resin coating of an organic high polymer, which reacts with said chemical conversion coating, include silica of an amount less than 10 g/l and is cationic in a water solution, formed over said chemical conversion coating.
Claim 3
Dependent Claim
17 words
Aluminum heat exchanger as claimed in claim 1, wherein; said resin coating is of a polyamide resin.
Claim 4
Dependent Claim
17 words
Aluminum heat exchanger as claimed in claim 2, wherein; said chemical conversion coating is of chromium phosphate.
Claim 5
Dependent Claim
17 words
Aluminum heat exchanger as claimed in claim 2, wherein; said chemical conversion coating is of chromic chromate.
Claim 6
Dependent Claim
17 words
Aluminum heat exchanger as claimed in claim 1, wherein; said resin coating is of cationic acrylic resin.
Claim 7
Dependent Claim
17 words
Aluminum heat exchanger as claimed in claim 5, wherein; said chemical conversion coating is of chromium phosphate.
Claim 8
Dependent Claim
16 words
Aluminum heat exchanger as claimed in claim 5, wherein; said chemical conversion coating is ofchromic chromate.
Claim 9
Dependent Claim
19 words
Aluminum heat exchanger as claimed in claim 1, wherein; said resin coating contains a tetra valent metallic element compound.
Claim 10
Dependent Claim
17 words
Aluminum heat exchanger as claimed in claim 8, wherein; said chemical conversion coating is of chromium phosphate.
Claim 11
Dependent Claim
17 words
Aluminum heat exchanger as claimed in claim 8, wherein; said chemical conversion coating is of chromic chromate.
Claim 12
Dependent Claim
16 words
Aluminum heat exchanger as claimed in claim 1, wherein; said resin coating contains a colloidal silica.
Claim 13
Dependent Claim
17 words
Aluminum heat exchanger as claimed in claim 11, wherein; said chemical conversion coating is of chromium phosphate.
Claim 14
Dependent Claim
17 words
Aluminum heat exchanger as claimed in claim 11, wherein; said chemical conversion coating is of chromic chromate.
Claim 15
Dependent Claim
18 words
Aluminum heat exchanger as claimed in claim 1, wherein; said resin coating contains a bactericide and a deodorant.
Claim 16
Dependent Claim
17 words
Aluminum heat exchanger as claimed in claim 14, wherein; said chemical conversion coating is of chromium phosphate.
Claim 17
Dependent Claim
17 words
Aluminum heat exchanger as claimed in claim 14, wherein; said chemical conversion coating is of chromic chromate.
Claim 18
Dependent Claim
17 words
Aluminum heat exchanger as claimed in claim 1, wherein; said chemical conversion coating is of chromium phosphate.
Claim 19
Dependent Claim
17 words
Aluminum heat exchanger as claimed in claim 1, wherein; said chemical conversion coating is of chromic chromate.
References Cited (Backward Citations)
AT335249B
Cited
AT335235B
Cited
DE2515007A1
Cited
AT346989B
Cited
JPS5599976A
Cited
US4368776A
Cited
US4353224A
Cited
US4421789A
Cited
JPS5816192A
Cited
JPS59202398A
Cited
US4588025A
Cited
US4536420A
Cited
US4726886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |