US4594279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat insulator
Assignee: Panasonic Holdings Corp
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Filing: 1984-09-26
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Granted: 1986-06-10
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Expires: 2004-09-26
Abstract
Abstract A heat insulator comprises a vacuum-filled pliable container containing a mass of flaky pearlite particles. The flaky pearlite particles have a thickness not greater than 0.5 micrometer and an average particle size not greater than 100 micrometers.
Inventors
- 👤 Hiroshi Yoneno
- 👤 Yoshihiro Matsuo
- 👤 Shoichi Ishihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:54
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/78; E04B1/80; E04B1/803; Y; Y02; Y02A; Y02A30/00; Y02A30/24; Y02A30/242; Y02B; Y02B80/00; Y02B80/10; Y10; Y10S; Y10S428/00; Y10S428/92; Y10T; Y10T428/00; Y10T428/23; Y10T428/231; Y10T428/233; Y10T428/239
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
51 words
A heat insulator comprising a vacuum-filled container containing a mass of flaky pulverized particles of expanded pearlite having a thickness of not greater than 0.5 micrometer and an average particle size of not greater than 100 micrometers, said vacuum in the container being within the range of 0.01 to 10 Torr.
Claim 2
Dependent Claim
51 words
A heat insulator comprising a vacuum-filled container containing a mass of flaky pulverized particles of expanded pearlite having a thickness of not greater than 0.5 micrometer and an average particle size of not greater than 100 micrometers, said vacuum in the container being within the range of 0.01 to 10 Torr.
Claim 3
Dependent Claim
63 words
A heat insulator having a thermal conductivity of not more than 0.01 Kcal/mh° C., comprising a laminated vacuum-filled container containing a mass of flaky pulverized particles of expanded pearlite having a thickness of not greater than 0.5 micrometer and an average particle size of not greater than 100 micrometers, said vacuum in the container being within the range of 0.01 to 10 Torr.
Claim 4
Dependent Claim
63 words
A heat insulator having a thermal conductivity of not more than 0.01 Kcal/mh° C., comprising a laminated vacuum-filled container containing a mass of flaky pulverized particles of expanded pearlite having a thickness of not greater than 0.5 micrometer and an average particle size of not greater than 100 micrometers, said vacuum in the container being within the range of 0.01 to 10 Torr.
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) | 1989-06-09 | 1989-12-09 | 1990-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-09 | 1993-12-09 | 1994-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-09 | 1997-12-09 | 1998-06-10 | $7700.00 | Window Closed / Lapsed |