US2816739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube and tube sheet assembly
Assignee: Schutte and Koerting Co
•
Filing: 1954-03-03
•
Granted: 1957-12-17
•
Expires: 1974-03-03
Abstract
No abstract record available.
Inventors
- 👤 Harvey E Stochr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:09
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/04; Y; Y10; Y10S; Y10S165/00; Y10S165/051; Y10S165/052; Y10S165/063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1790897A
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US1812509A
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GB373075A
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DE626578C
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US2018163A
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US2225856A
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US2493452A
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GB695390A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |