US3405220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction electric mold heater
Assignee: RTX Corp
•
Filing: 1965-07-16
•
Granted: 1968-10-08
•
Expires: 1985-07-16
Abstract
No abstract record available.
Inventors
- 👤 Robert B Barrow
- 👤 Larry W Sink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:28
CPC Classifications
B; B22; B22D; B22D27/00; B22D27/04; B22D27/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1842272A
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US1859680A
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US1926573A
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US2635125A
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US2673228A
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US2773750A
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US2909585A
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US3078529A
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US3036888A
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US3226223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |