US3116137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot pressed material and method of producing the same
Assignee: Avco Manufacturing Corp
•
Filing: 1958-07-01
•
Granted: 1963-12-31
•
Expires: 1978-07-01
Abstract
No abstract record available.
Inventors
- 👤 Vasilos Thomas
- 👤 Richard B Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:23
CPC Classifications
C; C03; C03B; C03B19/00; C03B19/06; C03B19/063; C03B19/066; C03B20/00; Y; Y10; Y10S; Y10S65/00; Y10S65/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
42 words
THE METHOD OF PRODUCING A TRANSLUCENT ARTICLE OF FUSED SILICA, A NON-CRYSTALLINE PHASE OF SILICON DIOXIDE, COMPRISING HOT PRESSING POWDERED FUSED SILICA, A NONCRYSTALLINE PHASE OF SILICON DIOXIDE, AT 1200*C. AND AT 2000 P.S.I. FOR A PERIOD OF AT LEAST THREE HOURS.
Claim 2
Independent Claim
42 words
THE METHOD OF PRODUCING A TRANSLUCENT ARTICLE OF FUSED SILICA, A NON-CRYSTALLINE PHASE OF SILICON DIOXIDE, COMPRISING HOT PRESSING POWDERED FUSED SILICA, A NONCRYSTALLINE PHASE OF SILICON DIOXIDE, AT 1200*C. AND AT 2000 P.S.I. FOR A PERIOD OF AT LEAST THREE HOURS.
Claim 3
Dependent Claim
108 words
THE PROCESS FOR PRODUCING A POROUS ARTICLE OF FUSED SILICA, A NON-CRYSTALLINE PHASE OF SILICON DIOXIDE, WHICH COMPRISES PLACING AN ADMIXTURE OF POWDERED FUSED SILICA, A NON-CRYSTALLINE PHASE OF SILICON DIOXIDE, AND A COMBUSTIBLE SUBSTANCE WITHIN FORMING DIES, SUBJECTING THE POWDERED ADMIXTURE TO PRESSURE IN EXCESS OF 250 P.S.I. AND HEAT IN THE TEMPERATURE RANGE OF 1050*C. TO 1450*C. UNTIL A CONSOLIDATED ARTICLE OF SAID FUSED SILICA AND SAID COMBUSTIBLE SUBSTANCE IS FORMED HAVING THE SHAPE OF THE DIES AND SUBJECTING THE CONSOLIDATED ARTICLE TO THE COMBUSTIBLE TEMPERATURE FOR A PERIOD OF TIME SUFFICIENT TO BURN THE COMBUSTIBLE SUBSTANCE OUT OF AND TO DEVELOP POROSITY WITHIN THE ARTICLE.
Claim 4
Dependent Claim
108 words
THE PROCESS FOR PRODUCING A POROUS ARTICLE OF FUSED SILICA, A NON-CRYSTALLINE PHASE OF SILICON DIOXIDE, WHICH COMPRISES PLACING AN ADMIXTURE OF POWDERED FUSED SILICA, A NON-CRYSTALLINE PHASE OF SILICON DIOXIDE, AND A COMBUSTIBLE SUBSTANCE WITHIN FORMING DIES, SUBJECTING THE POWDERED ADMIXTURE TO PRESSURE IN EXCESS OF 250 P.S.I. AND HEAT IN THE TEMPERATURE RANGE OF 1050*C. TO 1450*C. UNTIL A CONSOLIDATED ARTICLE OF SAID FUSED SILICA AND SAID COMBUSTIBLE SUBSTANCE IS FORMED HAVING THE SHAPE OF THE DIES AND SUBJECTING THE CONSOLIDATED ARTICLE TO THE COMBUSTIBLE TEMPERATURE FOR A PERIOD OF TIME SUFFICIENT TO BURN THE COMBUSTIBLE SUBSTANCE OUT OF AND TO DEVELOP POROSITY WITHIN THE ARTICLE.
References Cited (Backward Citations)
CA549723A
Cited
US1738663A
Cited
US1465545A
Cited
US829427A
Cited
US1051638A
Cited
US1610182A
Cited
US1536821A
Cited
US1838680A
Cited
GB425413A
Cited
US2270718A
Cited
GB510081A
Cited
US2310432A
Cited
GB622218A
Cited
US2459209A
Cited
US2762487A
Cited
US2775524A
Cited
US2837873A
Cited
US2890126A
Cited
US2890127A
Cited
US3010839A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-30 | 1967-07-01 | 1967-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-30 | 1971-07-01 | 1971-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-30 | 1975-07-01 | 1975-12-31 | $7700.00 | Window Closed / Lapsed |