US3489275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure prover for frangible containers
Assignee: Power Manufacturing Inc
•
Filing: 1968-01-29
•
Granted: 1970-01-13
•
Expires: 1988-01-29
Abstract
No abstract record available.
Inventors
- 👤 Whitney S Powers Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:17
CPC Classifications
B; B07; B07C; B07C5/00; B07C5/34; B07C5/3404; G; G01; G01N; G01N3/00; G01N3/08; G01N3/10; G01N3/12; Y; Y10; Y10S; Y10S209/00; Y10S209/913
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2314310A
Cited
US3389788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |