US3333954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of inoculants for cast iron
Assignee: British Cast Iron Research Association
•
Filing: 1964-07-28
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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 18:37
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.
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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) | 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 |