US2589705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of aerogels to render them waterproof
Assignee: Individual
•
Filing: 1944-07-29
•
Granted: 1952-03-18
•
Expires: 1964-07-29
Abstract
No abstract record available.
Inventors
- 👤 Samuel S Kistler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:25
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/50; D06M13/51; D06M13/513; D06M13/517; B; B01; B01J; B01J13/00; B01J13/0091; C; C01; C01B; C01B33/00; C01B33/113; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C09; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/3081; C01P; C01P2006/00; C01P2006/22; C01P2006/90; Y; Y10; Y10S; Y10S55/00; Y10S55/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
THE METHOD OF WATERPROOFING SILICA AEROGEL WHICH COMPRISES PASSING INTO INTIMATER CONTACT WITH SAID AEROGEL VAPORS OF A MIXTURE OF METHYL CHLORO-SILICANES CONSISTING OF DIMETHYL DICHLOROSILICANE AND SMALL AMOUNTS OF METHYL TRICHLOROSILICANE AND TRIMETHYL MONOCHLORO-SILICANE AND HAVING AN AVERAGE MOLECULAR WEIGHT OF 130, SAID VAPORS BEING DILUTED WITH NITROGEN GAS, AND THEN EXPOSING THE TREATED AEROGEL TO A STREAM OF AIR HEATED TO ABOUT 300* C. TO REMOVE THE HYDROGEN CHLORIDE FORMED.
Claim 2
Independent Claim
72 words
THE METHOD OF WATERPROOFING SILICA AEROGEL WHICH COMPRISES PASSING INTO INTIMATER CONTACT WITH SAID AEROGEL VAPORS OF A MIXTURE OF METHYL CHLORO-SILICANES CONSISTING OF DIMETHYL DICHLOROSILICANE AND SMALL AMOUNTS OF METHYL TRICHLOROSILICANE AND TRIMETHYL MONOCHLORO-SILICANE AND HAVING AN AVERAGE MOLECULAR WEIGHT OF 130, SAID VAPORS BEING DILUTED WITH NITROGEN GAS, AND THEN EXPOSING THE TREATED AEROGEL TO A STREAM OF AIR HEATED TO ABOUT 300* C. TO REMOVE THE HYDROGEN CHLORIDE FORMED.
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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) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |