US3487858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preformed coiled flexible tubing
Assignee: McDonnell Douglas Corp
•
Filing: 1966-01-11
•
Granted: 1970-01-06
•
Expires: 1986-01-11
Abstract
No abstract record available.
Inventors
- 👤 Francis J Hanback
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:32
CPC Classifications
F; F16; F16L; F16L3/00; F16L3/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1443550A
Cited
GB311482A
Cited
US2320178A
Cited
GB606925A
Cited
US2832374A
Cited
GB908532A
Cited
US3402743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |