Patent US982520A successfully refreshed from Google Patents.
US982520A
Expired / Lapsed
US
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High and low pressure testing device.
Assignee: Individual
•
Filing: 1910-09-19
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Granted: 1911-01-24
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Expires: 1930-09-19
Abstract
No abstract record available.
Inventors
- 👤 Duncan Mckenzie
- 👤 William Jarvie Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:33
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/28; G01M3/2853
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1914-01-23 | 1914-07-25 | 1915-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1918-01-23 | 1918-07-25 | 1919-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1922-01-23 | 1922-07-25 | 1923-01-24 | $7700.00 | Window Closed / Lapsed |