US3356779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of curing articles manufactured from cement and asbestos
Assignee: Individual
•
Filing: 1965-06-04
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Granted: 1967-12-05
•
Expires: 1985-06-04
Abstract
No abstract record available.
Inventors
- 👤 Herbert C Schulze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:24
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B40/00; C04B40/02; C04B40/0231
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
THE PROCESS OF MANUFACTURING AN ARTICLE FROM PORTLAND CEMENT, ASBESTOS AND SILICA, COMPRISING: MIXING PORTLAND CEMENT, ASBESTOS AND SILICA WITH WATER; PRESSURE FORMING THE RESULTING MIXTURE INTO A SHAPED ARTICLE; PLACING SAID SHAPED ARTICLE IN A CHAMBER; INTRODUCING AN ATMOSPHERE OF CARBON DIOXIDE INTO SAID CHAMBER; LEAVING SAID SHAPED ARTICLE WITHIN SAID CHAMBER UNTIL THE SURFACES OF SAID ARTICLE ARE GIVEN AN INITIAL SET THEREBY REDUCING THE DANGER OF HANDLING SAID ARTICLE UNTIL IT IS FURTHER CURED; REMOVING SAID SHAPED AND INITIALLY SET ARTICLE FROM SAID CHAMBER; AND THREAFTER PLACING SAID ARTICLE IN AN AUTOCLAVE AND SUBJECTING IT TO STEAM UNDER PRESSURE.
Claim 2
Dependent Claim
102 words
THE PROCESS OF MANUFACTURING AN ARTICLE FROM PORTLAND CEMENT, ASBESTOS AND SILICA, COMPRISING: MIXING PORTLAND CEMENT, ASBESTOS AND SILICA WITH WATER; PRESSURE FORMING THE RESULTING MIXTURE INTO A SHAPED ARTICLE; PLACING SAID SHAPED ARTICLE IN A CHAMBER; INTRODUCING AN ATMOSPHERE OF CARBON DIOXIDE INTO SAID CHAMBER; LEAVING SAID SHAPED ARTICLE WITHIN SAID CHAMBER UNTIL THE SURFACES OF SAID ARTICLE ARE GIVEN AN INITIAL SET THEREBY REDUCING THE DANGER OF HANDLING SAID ARTICLE UNTIL IT IS FURTHER CURED; REMOVING SAID SHAPED AND INITIALLY SET ARTICLE FROM SAID CHAMBER; AND THREAFTER PLACING SAID ARTICLE IN AN AUTOCLAVE AND SUBJECTING IT TO STEAM UNDER PRESSURE.
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) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |