US2489491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulsation absorber
Assignee: LOU SON DEV CO
•
Filing: 1946-01-12
•
Granted: 1949-11-29
•
Expires: 1966-01-12
Abstract
No abstract record available.
Inventors
- 👤 Johnson Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:32
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/04; F16L55/045; F16L55/05; F16L55/052; F16L55/053
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1824342A
Cited
US2342356A
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US2324701A
Cited
US2371632A
Cited
US2385016A
Cited
US2394401A
Cited
US2389791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |