US4557958B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
US4557958B1 - - Google Patents
Assignee: Standard Oil Co
•
Filing: 1984-07-03
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Granted: 1992-07-14
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Expires: 2004-07-03
Abstract
No abstract record available.
Inventors
- 👤 D Barkis Edward
- 👤 G Moore Douglas
- 👤 M Fernald Allen
- 👤 L Mcclellan Felton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:04
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/0002; D06N3/0015; D06N3/0038; D06N2209/00; D06N2209/12; D06N2209/121; D06N2209/123; D06N2209/126; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1352; Y10T428/1362; Y10T428/24; Y10T428/24802; Y10T428/2481
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) | 1995-07-14 | 1996-01-13 | 1996-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-14 | 2000-01-13 | 2000-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-14 | 2004-01-13 | 2004-07-14 | $7700.00 | Window Closed / Lapsed |