Patent US3619115A successfully refreshed from Google Patents.
Patent US3232772A successfully refreshed from Google Patents.
US3232772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory products and the production thereof
Assignee: Morgan Refractories Ltd
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Filing: 1963-05-01
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Granted: 1966-02-01
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Expires: 1983-05-01
Abstract
No abstract record available.
Inventors
- 👤 Hilton Raymond Frederick
- 👤 Steen William John
- 👤 Steele Brian Charles Hilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:26
CPC Classifications
C; C04; C04B; C04B38/00; B; B28; B28B; B28B1/00; B28B1/50; C04B28/00; C04B28/02; C04B38/0051; C04B38/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A FIRED REFRACTORY PRODUCT MADE FROM A FOAMED SLIP OF REFRACTORY MINERAL PARTICLES HAVING A POROUS STRUCTURE OF AT LEAST SUBSTANTIALLY SPHERICAL PORES IN A PROPORTION OF FROM 55 TO 90% INCLUSIVE OF THE WHOLE VOLUME OF THE PRODUCT, SAID PORES HAVING A DIAMETER NOT GREATER THAN 500 MICRONS, FROM 70 TO 100% OF THE TOTAL PORE VOLUME BEING CONSITUTED BY PORES HAVING A DIAMETER OF LESS THAN 200 MICRONS, FROM 37 TO 78% OF THE TOTAL PORE VOLUME BEING CONSTITUTED BY PORES HAVING A DIAMETER OF LESS THAN 100 MICRONS, FROM 25 TO 70% OF THE TOTAL PORE VOLUME BEING CONSTITUTED BY PORES HAVING A DIAMETER OF LESS THAN 70 MICRONS, FORM 10 TO 60% OF THE TOTAL PORE VOLUME BEING CONSTITUTED BY PORES HAVING A DIAMETER OF LESS THAN 40 MICRONS, FROM 5 TO 55% OF THE TOTAL PORE VOLUME BEING CONSTITUTED BY PORES HAVING A DIAMETER OF LESS THAN 20 MICRONS, AND FORM 0 TO 50% OF THE TOTAL PORE VOLUME BEING CONSTITUTED BY PORES HAVING A DIAMETER OF LESS THAN 10 MICRONS.
Claim 2
Dependent Claim
176 words
A FIRED REFRACTORY PRODUCT MADE FROM A FOAMED SLIP OF REFRACTORY MINERAL PARTICLES HAVING A POROUS STRUCTURE OF AT LEAST SUBSTANTIALLY SPHERICAL PORES IN A PROPORTION OF FROM 55 TO 90% INCLUSIVE OF THE WHOLE VOLUME OF THE PRODUCT, SAID PORES HAVING A DIAMETER NOT GREATER THAN 500 MICRONS, FROM 70 TO 100% OF THE TOTAL PORE VOLUME BEING CONSITUTED BY PORES HAVING A DIAMETER OF LESS THAN 200 MICRONS, FROM 37 TO 78% OF THE TOTAL PORE VOLUME BEING CONSTITUTED BY PORES HAVING A DIAMETER OF LESS THAN 100 MICRONS, FROM 25 TO 70% OF THE TOTAL PORE VOLUME BEING CONSTITUTED BY PORES HAVING A DIAMETER OF LESS THAN 70 MICRONS, FORM 10 TO 60% OF THE TOTAL PORE VOLUME BEING CONSTITUTED BY PORES HAVING A DIAMETER OF LESS THAN 40 MICRONS, FROM 5 TO 55% OF THE TOTAL PORE VOLUME BEING CONSTITUTED BY PORES HAVING A DIAMETER OF LESS THAN 20 MICRONS, AND FORM 0 TO 50% OF THE TOTAL PORE VOLUME BEING CONSTITUTED BY PORES HAVING A DIAMETER OF LESS THAN 10 MICRONS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |