US3197529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asbestos-cement sheets
Assignee: Johns Manville Corp
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Filing: 1962-07-26
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Granted: 1965-07-27
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Expires: 1982-07-26
Abstract
No abstract record available.
Inventors
- 👤 Norman S Greiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:13
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B28/26; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PROCESS FOR MANUFACTURING AN ASBESTOS-CEMENT SHEET COMPRISING THE STEPS OF: (A) FABRICATING BY "DRY PROCESS" AN UNDURED ASBESTOSCEMENT SHEET, HAVING A MOISTURE CONTENT, BY WEIGHT, GREATER THAN 10%, (B) CURING SAID SHEET, (C) DRYING SAID SHEET UNTIL THE MOISTURE CONTENT, BY WEIGHT, DOES NOT EXCEED ABOUT 2%, (D) APPLYING A SILICATE COATING WHICH COMPRISES AT LEAST ONE SILICATE COMPOUND SELECTED FROM THE GROUP CONSISTING OF SODIUM SILICATE AND POTASSIUM SILICATE TO THE SHEET WHILE THE TEMPERATURE OF THE SHEET IS IN THE RANGE OF ABOUT 90*F. TO ABOUT 150*F., AND (E) BAKING THE COATING.
Claim 2
Dependent Claim
95 words
A PROCESS FOR MANUFACTURING AN ASBESTOS-CEMENT SHEET COMPRISING THE STEPS OF: (A) FABRICATING BY "DRY PROCESS" AN UNDURED ASBESTOSCEMENT SHEET, HAVING A MOISTURE CONTENT, BY WEIGHT, GREATER THAN 10%, (B) CURING SAID SHEET, (C) DRYING SAID SHEET UNTIL THE MOISTURE CONTENT, BY WEIGHT, DOES NOT EXCEED ABOUT 2%, (D) APPLYING A SILICATE COATING WHICH COMPRISES AT LEAST ONE SILICATE COMPOUND SELECTED FROM THE GROUP CONSISTING OF SODIUM SILICATE AND POTASSIUM SILICATE TO THE SHEET WHILE THE TEMPERATURE OF THE SHEET IS IN THE RANGE OF ABOUT 90*F. TO ABOUT 150*F., AND (E) BAKING THE COATING.
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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |