US2999483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace wall and support construction
Assignee: Combustion Engineering Inc
•
Filing: 1957-11-08
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Granted: 1961-09-12
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Expires: 1977-11-08
Abstract
No abstract record available.
Inventors
- 👤 Wilbur H Armacost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:57
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/10; F22B37/62; F22B37/64; F22B37/66; F22B37/68; F22D; F22D1/00; F22D1/02; Y; Y10; Y10S; Y10S122/00; Y10S122/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |