US3761374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing an improved cutting tool
Assignee: Gillette Co LLC
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Filing: 1971-07-09
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Granted: 1973-09-25
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Expires: 1991-07-09
Abstract
Abstract THE SHARPENED EDGE OF A CUTTING IMPLEMENT SUCH AS A RAZOR BLADE IS MODIFIED BY SUBJECTING THE CUTTING EDGE TO ION BOMABARDMENT TO MODIFY THE TIP GEOMETRY OF THE CUTTING EDGE AND CONCURRENTLY DEPOSITING EDGE STRENGTHENING MATERIAL ON THE CUTTING EDGE. THIS CONCURRENT TIP MODIFICATION AND DEPOSITION PROCESS PRODUCES AN IMPLEMENT WITH A CUTTING EDGE AVERAGE TIP RADIUS OF LESS THAN ABOUT 400 ANGSTROMS WHILE INCREASING THE FACET WIDTH IN THE IMMEDIATE VICINITY OF THE CUTTING EDGE (FOR EXAMPLE AT A DISTANCE OF 6,000 ANGSTROMS FROM THE TIP) A SUBSTANTIAL AMOUNT BY THE DEPOSITION OF STRENGTHENING MATERIAL THEREON.
Inventors
- 👤 D Bromer
- 👤 A Sastri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:12
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/58; C23C14/5826; C23C14/5833; B; B26; B26B; B26B21/00; B26B21/54; B26B21/56; B26B21/58; C23C14/5873
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |