US3473194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic pipe sizing
Assignee: Celanese Corp
•
Filing: 1967-01-23
•
Granted: 1969-10-21
•
Expires: 1987-01-23
Abstract
No abstract record available.
Inventors
- 👤 John G Farrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:40
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/90; B29C48/901; B29C48/903; B29C48/03; B29C48/09; B29C48/885; B29C48/905; B29C48/911; B29C48/9115; B29C48/912; B29C48/919
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2594842A
Cited
US3378887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |