US3846144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gunable refractory composition
Assignee: Chicago Fire Brick Co
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Filing: 1973-10-25
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Granted: 1974-11-05
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Expires: 1993-10-25
Abstract
Abstract 1. A GUNABLE REFRACTORY COMPOSITION COMPRISING THE FOLLOWING MATERIALS IN PARTS BY WEIGHT: GRAPHITE OR CALCINED COAL --40-60 BAUXITE --20-40 SILICON -- 8-20 CALCIUM ALUMINATE -- 6-16 CALCIUM SILICATE -- 3-8
Inventors
- 👤 J Parsons
- 👤 H Rechter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:24
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/45; C04B41/50; C04B41/5076; C04B41/508; C04B28/00; C04B28/02; C04B28/06; C04B35/00; C04B35/515; C04B35/52; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; C04B35/6316; C04B35/66; C04B41/009; C04B41/80; C04B41/81; C04B41/85; C04B2111/00; C04B2111/00034; C04B2111/00146; C04B2111/00155; C04B2111/20; C04B2111/28; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3217; C04B2235/42; C04B2235/422
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A GUNABLE REFRACTORY COMPOSITION COMPRISING THE FOLLOWING MATERIALS IN PARTS BY WEIGHT: GRAPHITE OR CALCINED COAL --40-60 BAUXITE --20-40 SILICON -- 8-20 CALCIUM ALUMINATE -- 6-16 CALCIUM SILICATE -- 3-8
Claim 2
Dependent Claim
30 words
A GUNABLE REFRACTORY COMPOSITION COMPRISING THE FOLLOWING MATERIALS IN PARTS BY WEIGHT: GRAPHITE OR CALCINED COAL --40-60 BAUXITE --20-40 SILICON -- 8-20 CALCIUM ALUMINATE -- 6-16 CALCIUM SILICATE -- 3-8
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |