US3496629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for securing tubes to a tube sheet
Assignee: Combustion Engineering Inc
•
Filing: 1968-03-18
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Granted: 1970-02-24
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Expires: 1988-03-18
Abstract
No abstract record available.
Inventors
- 👤 John A Martucci
- 👤 John C Tobin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:27
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/20; F; F28; F28F; F28F9/00; F28F9/02; F28F9/04; F28F9/16; F28F9/18; B23K2101/00; B23K2101/04; B23K2101/06; B23K2101/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3188720A
Cited
US2251709A
Cited
US3079674A
Cited
US3105293A
Cited
US3025596A
Cited
US3101531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |