US3500927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroless metalization of unconsolidated earth formations
Assignee: Shell USA Inc
•
Filing: 1968-02-16
•
Granted: 1970-03-17
•
Expires: 1988-02-16
Abstract
No abstract record available.
Inventors
- 👤 Warren C Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:17
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/56; C09K8/57; C09K8/572
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2190121A
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US2658839A
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US2690402A
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US2766138A
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US2922737A
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US3011920A
Cited
US3093509A
Cited
US3198659A
Cited
US3393737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |