US2452219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the joining of tubes
Assignee: Individual
•
Filing: 1945-11-15
•
Granted: 1948-10-26
•
Expires: 1965-11-15
Abstract
No abstract record available.
Inventors
- 👤 Bergvall Knut Lennart
- 👤 Dahlberg Ernst Erik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:39
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/08; F16L37/084; F16L37/098; F16L37/0985; Y; Y10; Y10S; Y10S285/00; Y10S285/921
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) | 1951-10-26 | 1952-04-26 | 1952-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-26 | 1956-04-26 | 1956-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-26 | 1960-04-26 | 1960-10-26 | $7700.00 | Window Closed / Lapsed |