US2776473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube sealing
Assignee: Westinghouse Electric Corp
•
Filing: 1952-04-29
•
Granted: 1957-01-08
•
Expires: 1972-04-29
Abstract
No abstract record available.
Inventors
- 👤 Ruth M Dailey
- 👤 William J Knochel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:29
CPC Classifications
B; B21; B21D; B21D41/00; B21D41/04; B21D41/045; B23; B23D; B23D21/00; Y; Y10; Y10S; Y10S220/00; Y10S220/29
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1914634A
Cited
US2269839A
Cited
US2427597A
Cited
US2343457A
Cited
US2386747A
Cited
US2554328A
Cited
US2522408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |