Patent US2660564A successfully refreshed from Google Patents.
US2660564A
Expired / Lapsed
US
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Method of reducing the density of aerogels and similar materials
Assignee: Monsanto Chemicals Ltd
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Filing: 1948-08-27
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Granted: 1953-11-24
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Expires: 1968-08-27
Abstract
No abstract record available.
Inventors
- 👤 Walter M Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:30
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/0091; C; C01; C01B; C01B33/00; C01B33/113
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METHOD OF REDUCING THE APPARENT DENSITY OF A SILICA AEROGEL HAVING AN APPARENT DENSITY ABOVE ABOUT 5.5 POUNDS PER CUBIC FOOT WHICH CONSISTS IN FEEDING SAID SILICA AEROGEL AT THE RATE OF 50 TO 200 POUNDS PER HOUR INTO AN AIR-JET EJECTOR HAVING A CONSTRICTED THROAT WITH A MINIMUM DIAMETER BETWEEN ABOUT 1 AND 6 INCHES, AD SIMULTANEOUSLY FORCING SAID AREOGEL TOGETHER WITH AIR AT ATMOSPHERIC PRESSURE THROUGH THE CONSTRICTED THROAT OF SAID EJECTOR BY MEANS OF A HIGH VELOCITY AIR STREAM, SAID AIR STREAM BEING GENERATED BY
Claim 2
Independent Claim
89 words
A METHOD OF REDUCING THE APPARENT DENSITY OF A SILICA AEROGEL HAVING AN APPARENT DENSITY ABOVE ABOUT 5.5 POUNDS PER CUBIC FOOT WHICH CONSISTS IN FEEDING SAID SILICA AEROGEL AT THE RATE OF 50 TO 200 POUNDS PER HOUR INTO AN AIR-JET EJECTOR HAVING A CONSTRICTED THROAT WITH A MINIMUM DIAMETER BETWEEN ABOUT 1 AND 6 INCHES, AD SIMULTANEOUSLY FORCING SAID AREOGEL TOGETHER WITH AIR AT ATMOSPHERIC PRESSURE THROUGH THE CONSTRICTED THROAT OF SAID EJECTOR BY MEANS OF A HIGH VELOCITY AIR STREAM, SAID AIR STREAM BEING GENERATED BY
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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) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |