Patent US1318978A successfully refreshed from Google Patents.
Patent US3018515A successfully refreshed from Google Patents.
US3018515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of plastic sheets
Assignee: Clyde Paper Co Ltd
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Filing: 1958-12-16
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Granted: 1962-01-30
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Expires: 1978-12-16
Abstract
No abstract record available.
Inventors
- 👤 Sneddon Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:12
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/305; B29C48/31; B29C48/03; B29C48/07; B29C48/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
AN EXTRUSION DIE FOR EXTRUDING HOT MOLTEN PALSTIC DOWNWARDS AS A SHEET, THE DIE COMPRISING IN COMBINATION A BLOCK, THERE BEING FORMED IN SAID BLOCK A LONGITUDINAL CHANNEL TO RECEIVE THE MOLTEN PLASTIC AND A DEEP NARROW LONGITUDINAL SLIT EXTENDING FROM SAID CHANNEL TO THE UNDERSIDE OF THE BLOCK, SAID SLIT HAVING A CONSTRICTED MOUTH WHICH DETERMINES THE THICKNESS IF THE SHEET, A BLOCKAGE DEVICE WHICH IS A PRECISE FIT WITHIN THE CHANNEL
Claim 2
Dependent Claim
73 words
AN EXTRUSION DIE FOR EXTRUDING HOT MOLTEN PALSTIC DOWNWARDS AS A SHEET, THE DIE COMPRISING IN COMBINATION A BLOCK, THERE BEING FORMED IN SAID BLOCK A LONGITUDINAL CHANNEL TO RECEIVE THE MOLTEN PLASTIC AND A DEEP NARROW LONGITUDINAL SLIT EXTENDING FROM SAID CHANNEL TO THE UNDERSIDE OF THE BLOCK, SAID SLIT HAVING A CONSTRICTED MOUTH WHICH DETERMINES THE THICKNESS IF THE SHEET, A BLOCKAGE DEVICE WHICH IS A PRECISE FIT WITHIN THE CHANNEL
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) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |