US2997827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision grinding
Assignee: Corning Glass Works
•
Filing: 1958-07-30
•
Granted: 1961-08-29
•
Expires: 1978-07-30
Abstract
No abstract record available.
Inventors
- 👤 James W Giffen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:07
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/02; B24B5/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1560033A
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US2155072A
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US2367069A
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US2464032A
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US2431907A
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US2649670A
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US2648179A
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US2819569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |