Patent US5263794B1 successfully refreshed from Google Patents.
US5263794B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Environmentally safe underground piping system
Assignee: ENVIRON-OPW Inc
•
Filing: 1992-02-19
•
Granted: 1996-01-23
•
Expires: 2012-02-19
Abstract
No abstract record available.
Inventors
- 👤 Michael C Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:48
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/78; F; F16; F16L; F16L19/00; F16L19/06; F16L3/00; F16L3/08; F16L3/085; F16L47/00; F16L47/02; F16L5/00; F16L5/02; F16L5/10; F16L55/00; F16L9/00; F16L9/12; F16L9/18; G; G01; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/28; G01M3/2807; G01M3/283; G01M3/2892
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1999-01-22 | 1999-07-24 | 2000-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-22 | 2003-07-24 | 2004-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-22 | 2007-07-24 | 2008-01-23 | $7700.00 | Window Closed / Lapsed |