US3384358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuously renewable checker chamber for regenerative furnaces and the like
Assignee: SUNBEAM ENGINEERING Corp
•
Filing: 1965-10-24
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Granted: 1968-05-21
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Expires: 1985-10-24
Abstract
No abstract record available.
Inventors
- 👤 William A Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:51
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/16; C03B5/235; C03B5/237; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/03; Y10S165/032
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) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |