US3503515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permeation separatory apparatus
Assignee: EIDP Inc
•
Filing: 1968-10-03
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Granted: 1970-03-31
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Expires: 1988-10-03
Abstract
No abstract record available.
Inventors
- 👤 Victor J Tomsic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:30
CPC Classifications
B; B01; B01D; B01D65/00; B01D65/08; B01D24/00; B01D24/02; B01D24/10; B01D27/00; B01D27/02; B01D29/00; B01D63/00; B01D63/02; B01D63/024; B01D63/0241; B01D63/04; B01D63/043; B01D2321/00; B01D2321/20; B01D2321/2083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-30 | 1973-09-29 | 1974-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-30 | 1977-09-29 | 1978-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-30 | 1981-09-29 | 1982-03-31 | $7700.00 | Window Closed / Lapsed |