US3399875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treating furnace
Assignee: Abar Ipsen Industries Inc
•
Filing: 1966-04-21
•
Granted: 1968-09-03
•
Expires: 1986-04-21
Abstract
No abstract record available.
Inventors
- 👤 Illinois National Bank And The
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:03
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74; C21D1/773; F; F27; F27D; F27D1/00; F27D1/18; F27D1/1858
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US871421A
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US890175A
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US1455290A
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US1795324A
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US2398874A
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US2373891A
Cited
US2804855A
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US3234661A
Cited
US3301541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |