Patent US2914487A successfully refreshed from Google Patents.
US2914487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonding of adsorbent materials
Assignee: SPORLAN VALVE Co Inc
•
Filing: 1955-06-15
•
Granted: 1959-11-24
•
Expires: 1975-06-15
Abstract
No abstract record available.
Inventors
- 👤 John E Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:55
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/28; B01J20/28014; B01J20/28042; B01J20/2803
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
PROCESS OF FORMING A MOLDED, POROUS FILTER BLOCK WHICH COMPRISES MIXING CALCIUM ALUMINATE WITH SODIUM SILICATE SOLUTION TO PROVIDE A BONDING MEDIUM IS WHICH THERE IS NO MORE THAN 50% BY WEIGHT OF CALCIUM ALUMINATE, THE CALCIUM ALUMINATE BEING SELECTED FROM A GROUP CONSISTING OF ESSENTIALLY CALCIUM MONOALUMINATE, CALCIUM TRIALUMINATE AND LUMNITE CEMENT, FURTHER MIXING ABOUT 10% BONDING MEDIUM BY WEIGHT WITH GRANULAR MINERAL ADSORBENT MATERIAL UNTIL THE ENTIRE MIX FORMS A TACKY MASS, MOLDING THE TACKY MASS UNDER PRESURE FOR SEVERAL MINUTES INTO BLOCKS, REMOVING THE BLOCKS FROM THE MOLDS, AND IMMEDIATELY FIRING THE MOLDED BLOCK AT ABOUT 600 DEGREES TO 900 DEGREES F.
Claim 2
Dependent Claim
105 words
PROCESS OF FORMING A MOLDED, POROUS FILTER BLOCK WHICH COMPRISES MIXING CALCIUM ALUMINATE WITH SODIUM SILICATE SOLUTION TO PROVIDE A BONDING MEDIUM IS WHICH THERE IS NO MORE THAN 50% BY WEIGHT OF CALCIUM ALUMINATE, THE CALCIUM ALUMINATE BEING SELECTED FROM A GROUP CONSISTING OF ESSENTIALLY CALCIUM MONOALUMINATE, CALCIUM TRIALUMINATE AND LUMNITE CEMENT, FURTHER MIXING ABOUT 10% BONDING MEDIUM BY WEIGHT WITH GRANULAR MINERAL ADSORBENT MATERIAL UNTIL THE ENTIRE MIX FORMS A TACKY MASS, MOLDING THE TACKY MASS UNDER PRESURE FOR SEVERAL MINUTES INTO BLOCKS, REMOVING THE BLOCKS FROM THE MOLDS, AND IMMEDIATELY FIRING THE MOLDED BLOCK AT ABOUT 600 DEGREES TO 900 DEGREES F.
References Cited (Backward Citations)
US1029954A
Cited
US1657753A
Cited
US1788706A
Cited
US1873296A
Cited
US1913943A
Cited
US2057414A
Cited
US2695850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |