Patent US3870147A successfully refreshed from Google Patents.
Patent US3333954A successfully refreshed from Google Patents.
US3333954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of inoculants for cast iron
Assignee: British Cast Iron Research Association
•
Filing: 1964-07-28
•
Granted: 1967-08-01
•
Expires: 1984-07-28
Abstract
No abstract record available.
Inventors
- 👤 Dawson John Victor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:31
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/10; C21C1/105; C22; C22C; C22C35/00; C22C35/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THE METHOD OF INTRODUCING STRONTIUM INTO A FERROSLICON INOCULANT SUBSTANCE FOR USE IN THE PRODUCTION OF HIGH GRADE CAST IRON WHICH INCLUDES THE STEPS OF ADDING A STRONTIUM-RICH MATERIAL TO MOLTEN FERROSILICON LOW IN CALCIUM AND ALUMINUM CONTAMINANTS AT A TEMPERATURE SUFFICIENT TO CAUSE SAID STRONTIUM-RICH MATERIAL TO REMAIN AS A MOBILE FLUID FOR A PERIOD SUFFICIENT TO CASUE THE DESIRED AMOUNT OF STRONTIUM TO ENTER THE FERROSILICON.
Claim 2
Independent Claim
68 words
THE METHOD OF INTRODUCING STRONTIUM INTO A FERROSLICON INOCULANT SUBSTANCE FOR USE IN THE PRODUCTION OF HIGH GRADE CAST IRON WHICH INCLUDES THE STEPS OF ADDING A STRONTIUM-RICH MATERIAL TO MOLTEN FERROSILICON LOW IN CALCIUM AND ALUMINUM CONTAMINANTS AT A TEMPERATURE SUFFICIENT TO CAUSE SAID STRONTIUM-RICH MATERIAL TO REMAIN AS A MOBILE FLUID FOR A PERIOD SUFFICIENT TO CASUE THE DESIRED AMOUNT OF STRONTIUM TO ENTER THE FERROSILICON.
References Cited (Backward Citations)
US2036576A
Cited
US2154613A
Cited
US2221781A
Cited
US2610911A
Cited
US2494238A
Cited
US2676097A
Cited
US2821476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |