US3385103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe leak indicating apparatus
Assignee: LOOMIS HYDRAULIC TESTING COMPA
•
Filing: 1966-04-25
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Granted: 1968-05-28
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Expires: 1986-04-25
Abstract
No abstract record available.
Inventors
- 👤 John P Wilkerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:30
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/006; E21B47/00; E21B47/10; E21B47/117; G; G01; G01M; G01M3/00; G01M3/02; G01M3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US784483A
Cited
US1273914A
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US2264515A
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US2287340A
Cited
US2587192A
Cited
DE812848C
Cited
US2766613A
Cited
US2761311A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |