US2503495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling
Assignee: Individual
•
Filing: 1947-03-03
•
Granted: 1950-04-11
•
Expires: 1967-03-03
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Koester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:05
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/28; F16L37/38; F16L37/40; F16L37/22; F16L37/23
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1706460A
Cited
US1638261A
Cited
US1858276A
Cited
US1953830A
Cited
US2044252A
Cited
US2255333A
Cited
US2248701A
Cited
US2322877A
Cited
US2279146A
Cited
US2297548A
Cited
US2327611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-10 | 1953-10-10 | 1954-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-10 | 1957-10-10 | 1958-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-10 | 1961-10-10 | 1962-04-11 | $7700.00 | Window Closed / Lapsed |