Patent US3030937A successfully refreshed from Google Patents.
US3030937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace wall and support
Assignee: Combustion Engineering Inc
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Filing: 1958-01-10
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Granted: 1962-04-24
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Expires: 1978-01-10
Abstract
No abstract record available.
Inventors
- 👤 Ernest C Witzke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:21
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/62; F22B37/64; F22B37/66; F22B37/02; F22B37/10; F22B37/14; F22B37/146; F22B37/20; F22B37/208
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2014197A
Cited
US2305611A
Cited
US2469487A
Cited
US2570073A
Cited
US2700375A
Cited
US2757649A
Cited
US2834324A
Cited
US2896591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-23 | 1965-10-23 | 1966-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-23 | 1969-10-23 | 1970-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-23 | 1973-10-23 | 1974-04-24 | $7700.00 | Window Closed / Lapsed |