US2678224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver plated tube ends for expanded tube seats
Assignee: Babcock and Wilcox Co
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Filing: 1951-04-19
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Granted: 1954-05-11
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Expires: 1971-04-19
Abstract
No abstract record available.
Inventors
- 👤 Lambert F Kooistra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:22
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/001; B; B21; B21D; B21D39/00; B21D39/06; F22; F22G; F22G3/00; F22G3/009; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12896; Y10T428/12951; Y10T428/12972
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-10 | 1957-11-09 | 1958-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-10 | 1961-11-09 | 1962-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-10 | 1965-11-09 | 1966-05-11 | $7700.00 | Window Closed / Lapsed |