US2864756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the treatment of plastic materials
Assignee: Modern Plastic Machinery Corp
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Filing: 1955-06-08
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Granted: 1958-12-16
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Expires: 1975-06-08
Abstract
No abstract record available.
Inventors
- 👤 Rothacker Francis Neill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:47
CPC Classifications
B; B41; B41F; B41F23/00; B41F23/007; B29; B29C; B29C59/00; B29C59/10; B41M; B41M1/00; B41M1/26; B41M1/30; B41M1/305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
THE IMPROVED METHOD OF TREATING A POLYETHYLENE MATERIAL, COMPRISING THE STEPS OF ESTABLISHING AT A SURFACE OF SAID MATERIAL A D. C. ELECTRIC FIELD AND ALTERNATELY VARYING THE INTENSITY OF SAID ELECTRIC FIELD BETWEEN POINTS BELOW AND ABOVE THE GASEOUS DISCHARGE POINT OF THE AMBIENT ATMOSPHERE ADJACENT TO SAID MATERIAL SURFACE.
Claim 2
Dependent Claim
51 words
THE IMPROVED METHOD OF TREATING A POLYETHYLENE MATERIAL, COMPRISING THE STEPS OF ESTABLISHING AT A SURFACE OF SAID MATERIAL A D. C. ELECTRIC FIELD AND ALTERNATELY VARYING THE INTENSITY OF SAID ELECTRIC FIELD BETWEEN POINTS BELOW AND ABOVE THE GASEOUS DISCHARGE POINT OF THE AMBIENT ATMOSPHERE ADJACENT TO SAID MATERIAL SURFACE.
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) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |