US3224900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making polyethylene coated razor blades
Assignee: Philip Morris USA Inc
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Filing: 1962-10-04
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Granted: 1965-12-21
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Expires: 1982-10-04
Abstract
No abstract record available.
Inventors
- 👤 Creamer Robert Marion
- 👤 Weissbecker Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:01
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/54; B26B21/58; B26B21/60; B05; B05D; B05D7/00; B05D7/14; B05D7/16; B05D1/00; B05D1/18; B05D2507/00; B05D2507/01; B05D3/00; B05D3/02; B05D3/0218; B05D3/0254; B05D3/0281; B05D3/04; B05D3/0486; B05D3/0493
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A METHOD FOR APPLYING A PLYETHYLENE RESIN COATING TO THE CUTTING EDGE OF A RAZOR BLADE WHICH COMPRISES APPLYING A POLYETHYLENE RESIN TO A BLADE AND THEREAFTER HEATING THE BLADE IN AN OXYGEN-FREE ATMOSPHERE AT A TEMPERATURE OF FROM ABOUT 150*C. TO ABOUT 500*C. FOR A PERIOD OF FROM ABOUT 0.25 TO 15 MINUTES.
Claim 2
Independent Claim
54 words
A METHOD FOR APPLYING A PLYETHYLENE RESIN COATING TO THE CUTTING EDGE OF A RAZOR BLADE WHICH COMPRISES APPLYING A POLYETHYLENE RESIN TO A BLADE AND THEREAFTER HEATING THE BLADE IN AN OXYGEN-FREE ATMOSPHERE AT A TEMPERATURE OF FROM ABOUT 150*C. TO ABOUT 500*C. FOR A PERIOD OF FROM ABOUT 0.25 TO 15 MINUTES.
References Cited (Backward Citations)
BE605577A
Cited
US3071858A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |