Patent US3049752A successfully refreshed from Google Patents.
US3049752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for obtaining impression
Assignee: Shell USA Inc
•
Filing: 1959-12-23
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Granted: 1962-08-21
•
Expires: 1979-12-23
Abstract
No abstract record available.
Inventors
- 👤 Robert M Jorda
- 👤 Royal P Yachik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:39
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/09; E21B47/098
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US214500A
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US1497190A
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US869520A
Cited
US1026525A
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US2102080A
Cited
US2405245A
Cited
US2416441A
Cited
US2618014A
Cited
US2653474A
Cited
US2972156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |