US4463799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat storage medium for latent heat thermal energy storage unit
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1981-10-28
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Granted: 1984-08-07
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Expires: 2001-10-28
Abstract
Abstract A heat storage medium for use in a latent heat TES unit is obtained by treating a crystalline polyolefin with ion plasma thereby crosslinking it only in the surface region.
Inventors
- 👤 Yoshio Takahashi
- 👤 Takeo Ozawa
- 👤 Ryuji Sakamoto
- 👤 Katsuhiko Kanari
- 👤 Masayuki Kamimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:30
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/06; F; F28; F28D; F28D20/00; F28D20/02; F28D20/023; Y; Y02; Y02E; Y02E60/00; Y02E60/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
28 words
A heat storage medium for a latent heat TES unit, obtained by treating a crystalline polyolefin with ion plasma thereby crosslinking it only in the surface region thereof.
Claim 2
Dependent Claim
28 words
A heat storage medium for a latent heat TES unit, obtained by treating a crystalline polyolefin with ion plasma thereby crosslinking it only in the surface region thereof.
Claim 3
Dependent Claim
15 words
The heat storage medium according to claim 1, wherein the crystalline polyolefin is crystalline polyethylene.
Claim 4
Dependent Claim
27 words
The heat storage medium according to claim 1 or claim 2, wherein the crystalline polyolefin is formed in a required shape and thereafter treated with ion plasma.
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) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |