Patent US2738993A successfully refreshed from Google Patents.
US2738993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible tube couplings
Assignee: Boeing Co
•
Filing: 1953-01-19
•
Granted: 1956-03-20
•
Expires: 1973-01-19
Abstract
No abstract record available.
Inventors
- 👤 Wayne L Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:53
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/002; F16L21/005; F16L27/00; F16L27/10; F16L27/107
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |