Patent US2810639A successfully refreshed from Google Patents.
US2810639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy for addition to molten cast iron
Assignee: Individual
•
Filing: 1956-08-10
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Granted: 1957-10-22
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Expires: 1976-08-10
Abstract
No abstract record available.
Inventors
- 👤 Harry H Kessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:32
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/08; C22; C22C; C22C28/00; C22C35/00; C21C1/10; C21C1/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
AN ALLOY FOR ADDITION TO MOLTEN CAST IRON, SAID ALLOY CONSISTING ESSENTIALLY OF 60 TO 80% SILICON, 15 TO 25% MANGANESE, 0.5 TO 1,5% CALCIUM, 0.2 TO 1.5% ALUMINUM, 1.5 TO 2.5% BARIUM AND UP TO 5% IRON.
Claim 2
Dependent Claim
38 words
AN ALLOY FOR ADDITION TO MOLTEN CAST IRON, SAID ALLOY CONSISTING ESSENTIALLY OF 60 TO 80% SILICON, 15 TO 25% MANGANESE, 0.5 TO 1,5% CALCIUM, 0.2 TO 1.5% ALUMINUM, 1.5 TO 2.5% BARIUM AND UP TO 5% IRON.
References Cited (Backward Citations)
US1683086A
Cited
US2266122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |