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US4507019B1
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US4507019B1 - - Google Patents
Assignee: GM Co EXPAND-A-LINE 1 Inc
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Filing: 1983-02-22
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Granted: 1987-12-08
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Expires: 2003-02-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:35
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/28; E21B7/30; E21B7/04; E21B7/046; E21B7/20; E21B7/205; F; F16; F16L; F16L55/00; F16L55/16; F16L55/162; F16L55/165; F16L55/1658; Y; Y10; Y10T; Y10T225/00; Y10T225/30; Y10T225/371
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) | 1990-12-07 | 1991-06-08 | 1991-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-07 | 1995-06-08 | 1995-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-07 | 1999-06-08 | 1999-12-08 | $7700.00 | Window Closed / Lapsed |