US2920946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for processing of existing air vapor mixtures
Assignee: Individual
•
Filing: 1954-05-17
•
Granted: 1960-01-12
•
Expires: 1974-05-17
Abstract
No abstract record available.
Inventors
- 👤 Howard F Weaver
- 👤 Abelow Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:48
CPC Classifications
B; B01; B01D; B01D5/00; B01D5/0027; Y; Y10; Y10S; Y10S261/00; Y10S261/83
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US226664A
Cited
US607417A
Cited
US1138581A
Cited
US1329309A
Cited
US1634022A
Cited
US1747094A
Cited
US1852172A
Cited
US1960108A
Cited
US1945464A
Cited
US2077019A
Cited
US2139506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |