US3446884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion process and apparatus for producing a thermoplastic pipe having a glossy surface
Assignee: PPG Architectural Coatings Canada Inc
•
Filing: 1967-03-08
•
Granted: 1969-05-27
•
Expires: 1987-03-08
Abstract
No abstract record available.
Inventors
- 👤 Roger M Miller
- 👤 Bruno Mueller
- 👤 Walter G Sorochan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:21
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/03; B29C48/09; B29C48/3001; B29C48/3003; Y; Y10; Y10S; Y10S425/00; Y10S425/055
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2403476A
Cited
US2491588A
Cited
US2814071A
Cited
US2736057A
Cited
US3170972A
Cited
US3008434A
Cited
US3134832A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |