Patent US4665275A successfully refreshed from Google Patents.
US4665275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal medium oils
Assignee: Eneos Corp
•
Filing: 1985-06-17
•
Granted: 1987-05-12
•
Expires: 2005-06-17
Abstract
Abstract A thermal medium oil comprising at least one monosubstituted naphthalene derivative such as beta -(1,1-dimethyloctyl) naphthalene, beta -(1,1-dimethylhexyl) naphthalene and 2-t.-amylnaphthalene.
Inventors
- 👤 Toshio Yoshida
- 👤 Harumichi Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:54
CPC Classifications
C; C10; C10M; C10M105/00; C10M105/02; C10M105/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
32 words
A thermal medium oil consisting essentially of at least one monosubstituted naphthalene of formula ##STR7## wherein R 1 and R 2 are the same, or different and are each methyl or ethyl.
Claim 2
Dependent Claim
32 words
A thermal medium oil consisting essentially of at least one monosubstituted naphthalene of formula ##STR7## wherein R 1 and R 2 are the same, or different and are each methyl or ethyl.
Claim 3
Dependent Claim
35 words
A thermal medium oil according to claim 1, wherein said monosubstituted naphthalene is beta-monosubstituted naphthalene of formula ##STR8## wherein R 1 and R 2 are the same, or different and are each methyl or ethyl.
References Cited (Backward Citations)
US2006202A
Cited
US2436110A
Cited
US3598739A
Cited
US3678123A
Cited
US4521324A
Cited
GB2163774A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-11 | 1990-11-10 | 1991-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-11 | 1994-11-10 | 1995-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-11 | 1998-11-10 | 1999-05-12 | $7700.00 | Window Closed / Lapsed |