US3203903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing physically strong aerogels
Assignee: Shell USA Inc
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Filing: 1960-06-27
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Granted: 1965-08-31
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Expires: 1980-06-27
Abstract
No abstract record available.
Inventors
- 👤 Hendrik Van Olphen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:11
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/0091
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCESS FOR PREPARING PHYSICALLY STABLE, MECHANI-ALLY CALLY STRONG AEROGEL OF COLLOIDAL CLAY COMPRISING FORMING AN AQUEOUS GEL OF SUCH COLLOIDAL CLAY UNIFORMLY ADMIXED WITH AN ORGANIC POLYMERS MATERIAL HAVING SUBSTANTIAL SOLUBILITY IN THE AQUEOUS DISPERSION MEDIUM AND SUBSEQUENTLY REPLACING SAID AQUEOUS DISPERSING MEDIUM WITH A GAS UNDER CONDITIONS WHICH AVOID SUBSTANTIAL SHRINKAGE OF SAID GEL AND WHICH PRODUCE A HARD, CHALKLIKE RIGID AEROGEL.
Claim 2
Dependent Claim
64 words
A PROCESS FOR PREPARING PHYSICALLY STABLE, MECHANI-ALLY CALLY STRONG AEROGEL OF COLLOIDAL CLAY COMPRISING FORMING AN AQUEOUS GEL OF SUCH COLLOIDAL CLAY UNIFORMLY ADMIXED WITH AN ORGANIC POLYMERS MATERIAL HAVING SUBSTANTIAL SOLUBILITY IN THE AQUEOUS DISPERSION MEDIUM AND SUBSEQUENTLY REPLACING SAID AQUEOUS DISPERSING MEDIUM WITH A GAS UNDER CONDITIONS WHICH AVOID SUBSTANTIAL SHRINKAGE OF SAID GEL AND WHICH PRODUCE A HARD, CHALKLIKE RIGID AEROGEL.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |