US2808338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal insulating bodies and method of manufacture
Assignee: Johns Manville Corp
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Filing: 1952-12-18
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Granted: 1957-10-01
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Expires: 1972-12-18
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Bruno
- 👤 Speil Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:20
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B30/00; C04B30/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
99 words
A HANDLEABLE INSULATING BODY HAVING A DENSITY OF FORM APPROXIMATELY 12 TO 30 LBS./CU.FT., HAVING A MODULUS OF RUPTURE OF FROM APPROXIMATELY 10 TO 120 LBS./SQ.IN., AND A THERMAL CONDUCTIVITY FACTOR K OF LESS THAN 0.4 AT 350*F. MEAN, WHICH CONSISTS ESSENTIALLY OF ASBESTOS REINFORCING FIBERS IN AMOUNT SUFFICIENT TO FORM A REINFORCING SKELETON UP TO APPROXIMATELY 15% BYWEIGHT, APPROXIMATELY 45 TO 95% BY WEIGHT OF INORGANIC AEROGEL PARTICLES, AND A SUBSTANTIAL AMOUNT UP TO APPROXIMATELY 100%, BY WEIGHT OF SAID AEROGEL PARTICLES, OF FINELY DIVIDED OPACIFIER PARTICLES, SAID BODY HELD IN SHAPE-RETAINING, HANDLEABLE FORM BY HYDROUS GEL BONDS.
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) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |