US2887744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pattern for impeller core
Assignee: Dresser Industries Inc
•
Filing: 1957-09-20
•
Granted: 1959-05-26
•
Expires: 1977-09-20
Abstract
No abstract record available.
Inventors
- 👤 Halliday David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:07
CPC Classifications
B; B22; B22C; B22C7/00; Y; Y10; Y10S; Y10S164/00; Y10S164/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US165237A
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US416333A
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US1443341A
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US2301140A
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US2611161A
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US2741817A
Cited
US2702418A
Cited
US2782477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |