US3837501B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
US3837501B1 - - Google Patents
Assignee: Pielkenrood Vinitex BV
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Filing: 1971-02-04
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Granted: 1984-10-02
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Expires: 1991-02-04
Abstract
No abstract record available.
Inventors
- 👤 J Pielkenrood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:09
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/0039; B01D21/0063; B01D21/0051; B01D21/0069; B01D21/0072; B01D21/0075; B01D21/02; B01D21/24; B01D21/2427; B01D21/2444
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) | 1987-10-02 | 1988-04-02 | 1988-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-02 | 1992-04-02 | 1992-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-02 | 1996-04-02 | 1996-10-02 | $7700.00 | Window Closed / Lapsed |