US2962805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making heat exchanger tubetube sheet joints
Assignee: Griscom Russell Co
•
Filing: 1957-07-11
•
Granted: 1960-12-06
•
Expires: 1977-07-11
Abstract
No abstract record available.
Inventors
- 👤 Oscar W Heimberger
- 👤 Robert M Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:46
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/26; B23P11/00; F; F28; F28F; F28F9/00; F28F9/02; F28F9/04; F28F9/16; F28F9/18; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US379749A
Cited
US1205037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |