US3516933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface-modified metals in composites and bearings
Assignee: BP PLC
•
Filing: 1968-03-28
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Granted: 1970-06-23
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Expires: 1988-03-28
Abstract
No abstract record available.
Inventors
- 👤 George Inglis Andrews
- 👤 Aleksander Jerzy Groszek
- 👤 Rodney Ernest Witheridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:52
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; C; C08; C08K; C08K3/00; C08K3/02; C08K3/08; C08K9/00; C22; C22C; C22C32/00; C22C32/0089
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |