Patent US2570078A successfully refreshed from Google Patents.
US2570078A
Expired / Lapsed
US
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Stirrer and feeder
Assignee: Corning Glass Works
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Filing: 1950-02-09
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Granted: 1951-10-02
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Expires: 1970-02-09
Abstract
No abstract record available.
Inventors
- 👤 Paul F Spremulli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:29
CPC Classifications
C; C03; C03B; C03B7/00; C03B7/08; C03B7/092; C03B5/00; C03B5/16; C03B5/18; C03B5/187; C03B5/1875
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1612658A
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US1074397A
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US1048025A
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US1084210A
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US1281610A
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US1374843A
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US1884427A
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US2033075A
Cited
US2100760A
Cited
US2254236A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |