US3147177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-density, heat-insulating material
Assignee: Armstrong World Industries Inc
•
Filing: 1962-04-16
•
Granted: 1964-09-01
•
Expires: 1982-04-16
Abstract
No abstract record available.
Inventors
- 👤 William G Owens
- 👤 Jr Charles Haines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:31
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B28/00; C04B28/02; C04B28/04; C04B41/45; C04B41/50; C04B41/5076; C04B41/60; C04B41/61; C04B41/65; C04B2111/00; C04B2111/00474; C04B2111/00612; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/249921; Y10T428/249953; Y10T428/249967; Y10T428/249968; Y10T428/249971; Y10T428/249973; Y10T428/31504; Y10T428/31652
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A LOW-DENSITY, HEAT-INSULATING PRODUCT HAVING AN OVER-ALL DENSITY IN THE RANGE OF 10-25 POUNDS PER CUBIC FOOT COMPRISING TWO DENSE, CEMENT-CONTAINING SKINS ON THE OUTER SURFACES THEREOF AND A CORE OF A MIXTURE OF 5-20% BY WEIGHT EXPANDED PERLITE, 10-70% BY WEIGHT ASBESTOS, AND 25-65% BY WEIGHT PORTLAND CEMENT, SAID CORE CONTAINING GAS-FORMED CELLS IN ADDITION TO THE CELLS CONTAINED IN THE PARTICLES OF EXPANDED PERLITE.
Claim 2
Dependent Claim
66 words
A LOW-DENSITY, HEAT-INSULATING PRODUCT HAVING AN OVER-ALL DENSITY IN THE RANGE OF 10-25 POUNDS PER CUBIC FOOT COMPRISING TWO DENSE, CEMENT-CONTAINING SKINS ON THE OUTER SURFACES THEREOF AND A CORE OF A MIXTURE OF 5-20% BY WEIGHT EXPANDED PERLITE, 10-70% BY WEIGHT ASBESTOS, AND 25-65% BY WEIGHT PORTLAND CEMENT, SAID CORE CONTAINING GAS-FORMED CELLS IN ADDITION TO THE CELLS CONTAINED IN THE PARTICLES OF EXPANDED PERLITE.
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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |