US2838073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surge pressure absorber
Assignee: Individual
•
Filing: 1953-09-01
•
Granted: 1958-06-10
•
Expires: 1973-09-01
Abstract
No abstract record available.
Inventors
- 👤 Mattia Samuel P Di
- 👤 John N Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:27
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/04; F16L55/045; F16L55/05; F16L55/052; F16L55/053; F16L55/054
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US398111A
Cited
US628222A
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FR881694A
Cited
US2290337A
Cited
US2495693A
Cited
US2532143A
Cited
US2609001A
Cited
US2712831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |