US2573195A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefabricated flue construction
Assignee: Kaiser Aluminum and Chemical Corp
•
Filing: 1949-03-16
•
Granted: 1951-10-30
•
Expires: 1969-03-16
Abstract
No abstract record available.
Inventors
- 👤 Russell O Gunderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:59
CPC Classifications
F; F27; F27D; F27D99/00; F27D99/007; F27D1/00; F27D7/00; F27D1/14; F27D1/145; F27D7/02; F27D2007/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1688321A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |