US3549743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistage drawing technique
Assignee: Celanese Canada Inc
•
Filing: 1967-05-15
•
Granted: 1970-12-22
•
Expires: 1987-05-15
Abstract
No abstract record available.
Inventors
- 👤 Peter R Riordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:55
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/228; D01; D01D; D01D5/00; D01D5/12; D01D5/24; D01D5/247; D01F; D01F6/00; D01F6/02; D01F6/04; D01F6/06; D01F6/58; D01F6/66
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |