US2617153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of silica membranes
Assignee: Thales SA
•
Filing: 1949-07-13
•
Granted: 1952-11-11
•
Expires: 1969-07-13
Abstract
No abstract record available.
Inventors
- 👤 Robillard Jean
- 👤 Pierree Claire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:22
CPC Classifications
H; H10; H10N; H10N10/00; H10N10/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A METHOD OF MANUFACTURING VERY THIN SILICA FILMS SUITABLE AS SUPPORTS FOR THERMOELECTRIC COUPLES COMPRISING THE STEPS OF VAPORIZING A SILICA POWDER IN VACUO, CONDENSING THE SILICA VAPORS THUS OBTAINED ON A COLLODION SHEET TO FORM A LAYER NOT EXCEEDING A THICKNESS OF 0.4 MICRON, AND DISSOLVING SAID COLLODION SHEET SO AS TO OBTAIN A SELFSUSTAINING SILICA FILM OF SAID THICKNESS.
Claim 2
Independent Claim
61 words
A METHOD OF MANUFACTURING VERY THIN SILICA FILMS SUITABLE AS SUPPORTS FOR THERMOELECTRIC COUPLES COMPRISING THE STEPS OF VAPORIZING A SILICA POWDER IN VACUO, CONDENSING THE SILICA VAPORS THUS OBTAINED ON A COLLODION SHEET TO FORM A LAYER NOT EXCEEDING A THICKNESS OF 0.4 MICRON, AND DISSOLVING SAID COLLODION SHEET SO AS TO OBTAIN A SELFSUSTAINING SILICA FILM OF SAID THICKNESS.
References Cited (Backward Citations)
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Cited
US976994A
Cited
US2289152A
Cited
US2382432A
Cited
US2360479A
Cited
US2438892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |