Patent US2926997A successfully refreshed from Google Patents.
US2926997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of chrysotile
Assignee: Owens Corning
•
Filing: 1957-01-02
•
Granted: 1960-03-01
•
Expires: 1977-01-02
Abstract
No abstract record available.
Inventors
- 👤 George L Kalousek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:04
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
THE METHOD OF FORMING CAPILLARY-LIKE FIBERS OF CRYSOLITE COMPRISING LEACHING THIN, FLAT, PLATY, LATTICE CRYSTALS OF ANTIGORITE WHOSE OCTAHEDRAL AND TETRAHEDRAL LAYERS ARE IN BALANCE SAID LAYERS CONTAINING MG(OH)2 AND A1*3+, FE3+ AND FE2+ IONS, WITH AN AMOUNT OF HYDROCHLORIC ACID SUFFICIENT TO REMOVE FROM 5 TO 75% OF THE TOTAL MG(OH)2, TOGETHER WITH A SUFFICIENT NUMBER OF SAID IONS TO CAUSE AN UNBALANCE IN THE STRESSES BETWEEN SAID UP INTO CAPILLARY-LIKE CHRYSOTILE FIBERS.
Claim 2
Independent Claim
74 words
THE METHOD OF FORMING CAPILLARY-LIKE FIBERS OF CRYSOLITE COMPRISING LEACHING THIN, FLAT, PLATY, LATTICE CRYSTALS OF ANTIGORITE WHOSE OCTAHEDRAL AND TETRAHEDRAL LAYERS ARE IN BALANCE SAID LAYERS CONTAINING MG(OH)2 AND A1*3+, FE3+ AND FE2+ IONS, WITH AN AMOUNT OF HYDROCHLORIC ACID SUFFICIENT TO REMOVE FROM 5 TO 75% OF THE TOTAL MG(OH)2, TOGETHER WITH A SUFFICIENT NUMBER OF SAID IONS TO CAUSE AN UNBALANCE IN THE STRESSES BETWEEN SAID UP INTO CAPILLARY-LIKE CHRYSOTILE FIBERS.
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) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |