Patent US2813305A successfully refreshed from Google Patents.
US2813305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of vitreous coating nonmetallic articles
Assignee: United Cement Products Co
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Filing: 1956-09-13
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Granted: 1957-11-19
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Expires: 1976-09-13
Abstract
No abstract record available.
Inventors
- 👤 James T Robson
- 👤 Harvey C Tucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:40
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C03; C03C; C03C4/00; C04B41/45; C04B41/50; C04B41/5022; C04B41/60; C04B41/61; C04B41/65
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
THE METHOD OF PRODUCING A COATED STRUCTURAL BUILDING ELEMENT HAVING A BODY OF HYDRAULIC CEMENT AND AG-GGREGATE, WHICH COMPRISES DUSTING A DRY FIRST COATING TO A SURFACE OF SAID BUILDING ELEMENT, SAID FIRST COATING COMPRISING A BODY WHICH AT A TEMPERATURE OF FROM ABOUT 800*F. TO ABOUT 1300*F. MATURES INTO A SEMI-VITRIFIED BODY HAVING A WATER ABSORPTION OF FROM ABOUT 1/2% TO ABOUT 20%, SPRAYING A WATER SUSPENSION OF SAID UNFIRED FIRST COATING OVER SAID DRY DUST COATING, ALLOWING SAIDD COATING TO PARTIALLY DRY, THEN SPRAYING A SECOND COATING OVER SAID FIRST COATING, SAID SECOND COATING COMPRISING A BODY WHICH AT A TEMPERATURE OF FROM ABOUT 800*F. TO ABOUT 1300*F. MATURES INTO A GLASSY GLAZE HAVING A WATER ABSORPTION OF LESS THAN 1/2%, ALLOWING SAID COATED ELEMENT TO DRY, SLOWLY HEATING SAID COATED ARTICLE AT FROM ABOUTT 800*F. TO ABOUT 1300*F. FOR ABOUT 4 TO ABOUT 10 HOURS AND THEN ALLOWING THE FIRED BUILDING ELEMENT TO SLOWLYY COOL TO SUBSTANTIALLY ROOM TEMPERATURE.
Claim 2
Independent Claim
162 words
THE METHOD OF PRODUCING A COATED STRUCTURAL BUILDING ELEMENT HAVING A BODY OF HYDRAULIC CEMENT AND AG-GGREGATE, WHICH COMPRISES DUSTING A DRY FIRST COATING TO A SURFACE OF SAID BUILDING ELEMENT, SAID FIRST COATING COMPRISING A BODY WHICH AT A TEMPERATURE OF FROM ABOUT 800*F. TO ABOUT 1300*F. MATURES INTO A SEMI-VITRIFIED BODY HAVING A WATER ABSORPTION OF FROM ABOUT 1/2% TO ABOUT 20%, SPRAYING A WATER SUSPENSION OF SAID UNFIRED FIRST COATING OVER SAID DRY DUST COATING, ALLOWING SAIDD COATING TO PARTIALLY DRY, THEN SPRAYING A SECOND COATING OVER SAID FIRST COATING, SAID SECOND COATING COMPRISING A BODY WHICH AT A TEMPERATURE OF FROM ABOUT 800*F. TO ABOUT 1300*F. MATURES INTO A GLASSY GLAZE HAVING A WATER ABSORPTION OF LESS THAN 1/2%, ALLOWING SAID COATED ELEMENT TO DRY, SLOWLY HEATING SAID COATED ARTICLE AT FROM ABOUTT 800*F. TO ABOUT 1300*F. FOR ABOUT 4 TO ABOUT 10 HOURS AND THEN ALLOWING THE FIRED BUILDING ELEMENT TO SLOWLYY COOL TO SUBSTANTIALLY ROOM TEMPERATURE.
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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) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |