Patent US3237928A successfully refreshed from Google Patents.
US3237928A
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US
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Control arrangement for controlled atmosphere furnace
Assignee: Basic Products Corp
•
Filing: 1961-12-22
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Granted: 1966-03-01
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Expires: 1981-12-22
Abstract
No abstract record available.
Inventors
- 👤 Joseph M Warman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:00
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74; C21D1/76; C21D1/763; C23; C23C; C23C8/00; C23C8/06; C23C8/28; C23C8/30; C23C8/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA587892A
Cited
CA592113A
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US2721788A
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US2799159A
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US2802725A
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US3025145A
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US3011873A
Cited
US3128323A
Cited
US3057693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |