US3428117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cooling hot waste gases
Assignee: Simon Carves Ltd
•
Filing: 1966-12-12
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Granted: 1969-02-18
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Expires: 1986-12-12
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Woodhead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:54
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/02; F22B1/18; F22B1/183; C; C21; C21C; C21C5/00; C21C5/28; C21C5/38; C21C5/40; Y; Y02; Y02P; Y02P10/00; Y02P10/25
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) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |