US2635900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-tight tube joint
Assignee: Douglas Aircraft Co Inc
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Filing: 1948-11-30
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Granted: 1953-04-21
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Expires: 1968-11-30
Abstract
No abstract record available.
Inventors
- 👤 Alfred M Mayo
- 👤 Harold L Walpole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:55
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/04; F16L23/08; F16L21/00; F16L21/02; F16L21/022
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) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |