US3384512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigging device and detection system
Assignee: Peoples Development Inc
•
Filing: 1966-10-21
•
Granted: 1968-05-21
•
Expires: 1986-10-21
Abstract
No abstract record available.
Inventors
- 👤 George A Frederick
- 👤 Leonard E Burchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:28
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/26; F16L55/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2601248A
Cited
US3011197A
Cited
US2953157A
Cited
US3148689A
Cited
US3120118A
Cited
US3092991A
Cited
US3232090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |