US2998270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible pipe coupling for use in a high pressure, high temperature pneumatic ducting system
Assignee: Lockheed Martin Corp
•
Filing: 1957-02-25
•
Granted: 1961-08-29
•
Expires: 1977-02-25
Abstract
No abstract record available.
Inventors
- 👤 Watkins William Mack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:54
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/10; F16L27/1004; F16D; F16D3/00; F16D3/16; F16D3/26; F16D3/38; F16L51/00; F16L51/02; F16L51/03; F16L59/00; F16L59/14; F16L59/16; F16L59/18; F16L59/185
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US996156A
Cited
US1615774A
Cited
US1425635A
Cited
US1547482A
Cited
US1884944A
Cited
US2438312A
Cited
US2479104A
Cited
US2504166A
Cited
GB649090A
Cited
US2520501A
Cited
US2712456A
Cited
US2937036A
Cited
US2846242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |