US2699796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved tuyere elbow
Assignee: Grindle Corp
•
Filing: 1952-07-05
•
Granted: 1955-01-18
•
Expires: 1972-07-05
Abstract
No abstract record available.
Inventors
- 👤 Aubrey J Grindle
- 👤 Jr Donald R Killmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:41
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/16; C21B7/163; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2567; Y10T137/8158; Y10T137/8359; Y10T137/8593; Y10T137/86493; Y10T137/86847
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US396765A
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US663177A
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US742919A
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US845213A
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US849539A
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US875101A
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US1713313A
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US2654388A
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US2438769A
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US2461392A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-17 | 1958-07-19 | 1959-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-17 | 1962-07-19 | 1963-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-17 | 1966-07-19 | 1967-01-18 | $7700.00 | Window Closed / Lapsed |