US2662001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate design for pulse columns
Assignee: Individual
•
Filing: 1951-06-12
•
Granted: 1953-12-08
•
Expires: 1971-06-12
Abstract
No abstract record available.
Inventors
- 👤 William A Burns
- 👤 Warren F Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:36
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/04; B01D11/0426; B01D11/043
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
51 words
A PLATE FOR A TWO-PHASE EXTRACTION COLUMN COMPRISING A PLATE HAVING A PLURALITY OF APERTURES THERETHROUGH, SAID PLATE COMPRISING TWO LAYERS OF DIFFERENT MATERIALS HAVING APERTURES IN ALIGNMENT, ONE OF SAID MATERIALS BEING FLUOROTHENE AND THE OTHER OF SAID MATERALS BEING STAINLESS STEEL, THE DIAMETER OF SAID APERTURES BEING 0.076 INCH.
References Cited (Backward Citations)
US1320396A
Cited
US2215359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |