US3513561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for drying and purifying post-chlorinated polyvinyl chloride
Assignee: Dynamit Nobel AG
•
Filing: 1967-07-31
•
Granted: 1970-05-26
•
Expires: 1987-07-31
Abstract
No abstract record available.
Inventors
- 👤 Gunther Meyer
- 👤 Heinrich Thielking
- 👤 Meinhard Springorum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:06
CPC Classifications
F; F26; F26B; F26B3/00; F26B3/02; F26B3/06; F26B3/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3212197A
Cited
GB1028062A
Cited
US3280472A
Cited
US3347961A
Cited
US3295221A
Cited
US3310882A
Cited
US3349499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |