US4849122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent electrical discharge machining fluid
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1987-09-16
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Granted: 1989-07-18
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Expires: 2007-09-16
Abstract
Abstract Disclosed is a transparent electrical discharge machining fluid which is provided by mixing 95-60% by weight of a mineral oil and/or a synthetic oil, 5-40% by weight of water and surface active agent in an amount of 5-40% by weight of said oil and water. This machining fluid is transparent and has a kinetic viscosity of 20 sSt or less at 40° C.
Inventors
- 👤 Kouji Imai
- 👤 Isoo Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:21
CPC Classifications
C; C10; C10M; C10M125/00; C10M125/14; B; B23; B23H; B23H7/00; B23H7/34; B23H1/00; B23H1/08; C10M133/00; C10M133/02; C10M133/04; C10M133/06; C10M133/10; C10M145/00; C10M145/18; C10M145/24; C10M145/26; C10M145/28; C10M145/36; C10M173/00; C10M2201/00; C10M2201/02; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/108; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/044; C10N; C10N2040/00; C10N2040/14; C10N2040/16; C10N2040/17; C10N2040/20; C10N2040/22; C10N2050/00; C10N2050/01
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
A transparent electrical discharge machining fluid having a kinetic viscosity of 20 cSt or less at 40° C., and consisting essentially of a mixture of 95-60% by weight of at least one oil selected from the group consisting of a mineral oil and a synthetic oil, said at least one oil having a kinetic viscosity of 1.5-5 cSt; 5-40% by weight of water; and 5-40% by weight, based on the mixture of said at least one oil and water, of a mixture of a nonionic surface active agent and an anionic surface active agent.
Claim 2
Dependent Claim
94 words
A transparent electrical discharge machining fluid having a kinetic viscosity of 20 cSt or less at 40° C., and consisting essentially of a mixture of 95-60% by weight of at least one oil selected from the group consisting of a mineral oil and a synthetic oil, said at least one oil having a kinetic viscosity of 1.5-5 cSt; 5-40% by weight of water; and 5-40% by weight, based on the mixture of said at least one oil and water, of a mixture of a nonionic surface active agent and an anionic surface active agent.
Claim 3
Dependent Claim
16 words
A machining fluid according to claim 1 wherein said mineral oil is a light mineral oil.
Claim 4
Dependent Claim
21 words
A machining fluid according to claim 1 wherein said surface active agent is combination of polyoxyethylene nonylphenyl ether and sodium alkylnaphthalenesulfonate.
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) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |