US4747240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulated PCM aggregate
Assignee: National Gypsum Co
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Filing: 1981-08-06
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Granted: 1988-05-31
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Expires: 2001-08-06
Abstract
Abstract Phase change materials (PCM's) having a phase change at about 10° C. to 30° C. are incorporated like a fine aggregate into building materials.
Inventors
- 👤 Walter E. Voisinet
- 👤 Deall Daymon
- 👤 John A. Slyh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:10
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/06; C09K5/063; F; F28; F28D; F28D20/00; F28D20/02; F28D20/023; Y; Y02; Y02E; Y02E60/00; Y02E60/14; Y10; Y10S; Y10S165/00; Y10S165/902
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
87 words
An inorganic cementitious interior building material comprising primarily inorganic material and including a cementitious ingredient for binding together all of the elements of said building material and, dispersed therewithin, a substantial and up to about 75% by volume portion of small particles of a phase change material having a substantial latent heat of fusion at a temperature in the range of about 10° C. to 30° C., said phase change material being in a form which retains its particle integrity during repeated cycles of melting and freezing.
Claim 2
Dependent Claim
87 words
An inorganic cementitious interior building material comprising primarily inorganic material and including a cementitious ingredient for binding together all of the elements of said building material and, dispersed therewithin, a substantial and up to about 75% by volume portion of small particles of a phase change material having a substantial latent heat of fusion at a temperature in the range of about 10° C. to 30° C., said phase change material being in a form which retains its particle integrity during repeated cycles of melting and freezing.
Claim 3
Dependent Claim
24 words
A cementitious building material as defined in claim 1 wherein said particles are capsules consisting of a phase change material sealed within a shell.
Claim 4
Dependent Claim
28 words
A cementitious building material as defined in claim 2 wherein said capsules are approximately spherical in shape and of a diameter of about 500 to about 3000 microns.
Claim 5
Dependent Claim
22 words
A cementitious building material as defined in claim 1 wherein said particles are non-encapsulated phase change materials which have been form stabilized.
Claim 6
Dependent Claim
20 words
A cementitious building material as defined in claim 1 wherein said building material is a coating for a building surface.
Claim 7
Dependent Claim
20 words
A cementitious building material as defined in claim 1 wherein said building material is a board for forming building walls.
Claim 8
Dependent Claim
19 words
A cementitious building material as defined in claim 1 wherein said building material is a tile floor underlay mortar.
Claim 9
Dependent Claim
43 words
A cementitious building material as defined in claim 1 wherein said building material is an interior surface forming material suitable for use on substantially all wall and ceiling surfaces and said phase change material has a phase change temperature of about 20°-22° C.
Claim 10
Dependent Claim
52 words
An interior building material comprising an inorganic cementitious binder, filler materials and a substantial and up to about 75% by volume portion of small capsules having sealed therein a phase change material having a substantial latent heat of fusion at a temperature in the range of about 10° C. to 30° C.
Claim 11
Dependent Claim
52 words
An interior building material comprising an inorganic cementitious binder, filler materials and a substantial and up to about 75% by volume portion of small capsules having sealed therein a phase change material having a substantial latent heat of fusion at a temperature in the range of about 10° C. to 30° C.
Claim 12
Dependent Claim
17 words
A building material as defined in claim 9 wherein said phase change material is a polyethylene glycol.
Claim 13
Dependent Claim
18 words
A building material as defined in claim 9 wherein said phase change material is a low melting paraffin.
Claim 14
Dependent Claim
25 words
A building material as defined in claim 9 wherein said phase change material is a hydrated salt of the class consisting of sodium and calcium.
Claim 15
Dependent Claim
45 words
A building comprising a plurality of rooms for human occupancy, each room being formed by a floor, a ceiling and a plurality of walls, a major portion of said ceilings and walls having a surface formed from a building material as defined in claim 1.
Claim 16
Dependent Claim
45 words
A building comprising a plurality of rooms for human occupancy, each room being formed by a floor, a ceiling and a plurality of walls, a major portion of said ceilings and walls having a surface formed from a building material as defined in claim 6.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |