US3684553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removing surface defects from articles having a thermoplastic surface
Assignee: EIDP Inc
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Filing: 1970-12-14
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Granted: 1972-08-15
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Expires: 1990-12-14
Abstract
Abstract A PROCESS FOR TREATING AN ARTICLE THAT HAS AN ESSENTIALLY THERMOPLASTIC POLYMER SURFACE TO REMOVE DEFECTS FROM THE SURFACE WHICH COMPRISES: (1) EXPOSING THE POLYMER SURFACE OF THE ARTICLE TO A PARTIAL PRESSURE OF A VISCOSITY REDUCING VAPOR FOR THE POLYMER; AND (2) ABSORBING SUFFICIENT VAPOR INTO THE POLYMER SURFACE OF THE ARTICLE TO REDUCE THE VISCOSITY OF THE POLYMER TO ALLOW THE POLYMER TO FLOW TO FORM A SMOOTH EVEN SURFACE.
Inventors
- 👤 John W Van Dyk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:26
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; B05D7/16; B05D3/00; B05D3/10; B05D3/107; Y; Y10; Y10T; Y10T428/00; Y10T428/31; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31696
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |