US2833532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Checker-brick and checker-work construction for regenerators
Assignee: Individual
•
Filing: 1955-09-08
•
Granted: 1958-05-06
•
Expires: 1975-09-08
Abstract
No abstract record available.
Inventors
- 👤 Lewis B Ries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:32
CPC Classifications
F; F28; F28D; F28D17/00; F28D17/02; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1227820A
Cited
US1927834A
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DE686788C
Cited
US2309789A
Cited
US2428461A
Cited
US2532112A
Cited
US2577170A
Cited
US2667343A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |