Patent US4780247A successfully refreshed from Google Patents.
US4780247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for controlling steady state exothermic temperature in the use of heat sensitive-electrically resistant composites
Assignee: Individual
•
Filing: 1986-09-09
•
Granted: 1988-10-25
•
Expires: 2006-09-09
Abstract
Abstract A method of controlling the steady state exothermic temperature in the range from 5° to about 60°-70° C. in polyethylene glycol-carbon powder system heat sensitive-electrically resistant composites including setting the steady state exothermic temperature by varying the molecular weight of polyethylene glycol within a range of approximately 100 to 1,000,000 while setting the amount of the carbon powder dispersed in polyethylene glycol within a range from 5 to 45 wt %.
Inventors
- 👤 Shigeyuki Yasuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:55
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/02; H01C7/027; G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/2401
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
83 words
A method for controlling the steady state exothermic temperature in heat sensitive-electrically resistant composites, that is characterized in that the steady state exothermic temperature is set to a necessary temperature by selecting at least two polyethylene glycols having different molecular weights within a range from 100 to 1,000,000 and mixing said at least two polyethylene glycols with 5 to 45 wt.% of carbon powder whereby a polyethylene glycol-carbon powder system heat sensitive-electrically resistant composite having a predetermined steady state exothermic temperature is produced.
Claim 2
Independent Claim
83 words
A method for controlling the steady state exothermic temperature in heat sensitive-electrically resistant composites, that is characterized in that the steady state exothermic temperature is set to a necessary temperature by selecting at least two polyethylene glycols having different molecular weights within a range from 100 to 1,000,000 and mixing said at least two polyethylene glycols with 5 to 45 wt.% of carbon powder whereby a polyethylene glycol-carbon powder system heat sensitive-electrically resistant composite having a predetermined steady state exothermic temperature is produced.
Claim 3
Dependent Claim
33 words
A method for controlling the steady state exothermic temperature in heat sensitive-electrically resistant composites as set forth in claim 1, wherein the molecular weight of the polyethylene glycol is from 200 to 50,000.
References Cited (Backward Citations)
US4629584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |