US3026043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blowdown tank and heat conservor
Assignee: CONCRETE BUILDING UNITS COMPAN
•
Filing: 1959-05-07
•
Granted: 1962-03-20
•
Expires: 1979-05-07
Abstract
No abstract record available.
Inventors
- 👤 Johnson W Lacy
- 👤 Jr Charles K Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:52
CPC Classifications
F; F01; F01K; F01K1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US973603A
Cited
US1850797A
Cited
US2055211A
Cited
US2289953A
Cited
US2312217A
Cited
US2582889A
Cited
US2582198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-19 | 1965-09-18 | 1966-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-19 | 1969-09-18 | 1970-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-19 | 1973-09-18 | 1974-03-20 | $7700.00 | Window Closed / Lapsed |