US2919764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adsorption system
Assignee: Engineers and Fabricators Inc
•
Filing: 1957-07-03
•
Granted: 1960-01-05
•
Expires: 1977-07-03
Abstract
No abstract record available.
Inventors
- 👤 Edward E Dillman
- 👤 Ringo Dan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:42
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/02; F16K5/0257; F16K5/0271; B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0454; B01D2259/00; B01D2259/40; B01D2259/40003; B01D2259/40005; B01D2259/403; B01D2259/404; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86501
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1892428A
Cited
US1958262A
Cited
US2226169A
Cited
US2535902A
Cited
US2771964A
Cited
US2790505A
Cited
US2799362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |