US2746892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layer heat insulating material
Assignee: Isoflex Corp
•
Filing: 1952-11-04
•
Granted: 1956-05-22
•
Expires: 1972-11-04
Abstract
No abstract record available.
Inventors
- 👤 Thore M Elfving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:59
CPC Classifications
B; B32; B32B; B32B37/00; B32B37/14; B32B37/146; B29; B29C; B29C70/00; B32B27/00; B60; B60R; B60R13/00; B60R13/02; B61; B61D; B61D27/00; B61D27/0018; B61D27/0027; B61D27/0072; B61D27/0081; B62; B62D; B62D25/00; B62D25/02; B62D33/00; B62D33/04; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/78; E04B1/80; E04B1/806; E04C; E04C2/00; E04C2/30; E04C2/32; E04C2/322; B29K; B29K2309/00; B29K2309/08; E04B2001/7691; Y; Y02; Y02T; Y02T30/00; Y10; Y10S; Y10S428/00; Y10S428/92; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24694; Y10T428/24711; Y10T428/24719; Y10T428/24727; Y10T428/27
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN A MULTI-LAYER HEAT INSULATING BOARD, THE COMBINATION OF A PLURALITY OF SPACRD IMPERVIOUS SHEETS OF REFLECTIVE METAL FOIL EACH HAVING CORRUGATIONS EXTENDING PARALLEL TO EACH OTHER, SAID SHEETS FORMING VAPOR, CONVECTION AND RADIATION BARRIERS, AND A BLANKET OF INSULATING MATERIAL OF SUBSTANTIAL THICKNESS DISPOSED BETWEEN SAID SHEETS AND SECURED DIRECTLY TO THE APEXES OF THE CORRUGATIONS AND SERVING TO PROVIDE INSULATION BETWEEN FOILS, SAID CORRUGATIONS BEING OPEN AND UNOBSTRUCTED WHEREBY TO PROVIDE DRAINAGE CHANNELS BETWEEN THE FOIL AND THE INSULATING MATERIAL.
Claim 2
Dependent Claim
82 words
IN A MULTI-LAYER HEAT INSULATING BOARD, THE COMBINATION OF A PLURALITY OF SPACRD IMPERVIOUS SHEETS OF REFLECTIVE METAL FOIL EACH HAVING CORRUGATIONS EXTENDING PARALLEL TO EACH OTHER, SAID SHEETS FORMING VAPOR, CONVECTION AND RADIATION BARRIERS, AND A BLANKET OF INSULATING MATERIAL OF SUBSTANTIAL THICKNESS DISPOSED BETWEEN SAID SHEETS AND SECURED DIRECTLY TO THE APEXES OF THE CORRUGATIONS AND SERVING TO PROVIDE INSULATION BETWEEN FOILS, SAID CORRUGATIONS BEING OPEN AND UNOBSTRUCTED WHEREBY TO PROVIDE DRAINAGE CHANNELS BETWEEN THE FOIL AND THE INSULATING MATERIAL.
References Cited (Backward Citations)
US1020567A
Cited
US2037813A
Cited
US2029679A
Cited
GB448543A
Cited
US2221309A
Cited
GB459574A
Cited
GB482809A
Cited
US2206059A
Cited
US2406815A
Cited
US2330941A
Cited
US2329456A
Cited
US2514170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |