US3440907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing cutting tools
Assignee: Corning Glass Works
•
Filing: 1967-02-16
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Granted: 1969-04-29
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Expires: 1987-02-16
Abstract
No abstract record available.
Inventors
- 👤 Robert F Wrench
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:57
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/12; B29C33/123; B23; B23P; B23P15/00; B23P15/28; B23P15/40; B28; B28B; B28B11/00; B28B11/08; B28B17/00; B28B17/0036; B29C70/00; B29C70/68; B29C70/72; B29L; B29L2031/00; B29L2031/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |