Patent US2076839A successfully refreshed from Google Patents.
Patent US4012307A successfully refreshed from Google Patents.
Patent US2966340A successfully refreshed from Google Patents.
US2966340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joining tubes to tube sheets
Assignee: Combustion Engineering Inc
•
Filing: 1957-03-08
•
Granted: 1960-12-27
•
Expires: 1977-03-08
Abstract
No abstract record available.
Inventors
- 👤 Edward C Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:36
CPC Classifications
F; F28; F28F; F28F19/00; F28F19/002; B; B21; B21D; B21D39/00; B21D39/06; B23; B23K; B23K35/00; B23K35/001; B23K35/004; F22; F22D; F22D1/00; F22D1/02; F22G; F22G3/00; F22G3/009; F28D; F28D7/00; F28D7/16; F28F21/00; F28F21/08; F28F21/081; F28F21/082; F28F21/083; F28F9/00; F28F9/02; F28F9/04; F28F9/16; F28F9/18; F28F9/185; Y; Y10; Y10S; Y10S285/00; Y10S285/905
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1438596A
Cited
US1856618A
Cited
US2209974A
Cited
US2368391A
Cited
US2678224A
Cited
US2745797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-27 | 1964-06-27 | 1964-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-27 | 1968-06-27 | 1968-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-27 | 1972-06-27 | 1972-12-27 | $7700.00 | Window Closed / Lapsed |