Patent US3072770A successfully refreshed from Google Patents.
US3072770A
Expired / Lapsed
US
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Method for the formation of cylinders
Assignee: Induction Heating Corp
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Filing: 1958-03-03
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Granted: 1963-01-08
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Expires: 1978-03-03
Abstract
No abstract record available.
Inventors
- 👤 Edward S Goodridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:57
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/15; B21C37/156; B21C37/157; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49789; Y10T29/4979; Y10T29/49798; Y10T83/00; Y10T83/283
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1639688A
Cited
GB393315A
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US2177545A
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US2444463A
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US2444465A
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US2666831A
Cited
US2692322A
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US2687464A
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US2769886A
Cited
US2827544A
Cited
US2826810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |