US1773140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing compressed gases
Assignee: Individual
•
Filing: 1928-08-24
•
Granted: 1930-08-19
•
Expires: 1948-08-24
Abstract
No abstract record available.
Inventors
- 👤 Heylandt Christian Wilhel Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:23
CPC Classifications
F; F17; F17C; F17C9/00; F17C9/02; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2221/00; F17C2221/01; F17C2221/011; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2225/00; F17C2225/01; F17C2225/0107; F17C2225/0123; F17C2225/03; F17C2225/036; F17C2227/00; F17C2227/03; F17C2227/0302; F17C2227/0367; F17C2227/0369; F17C2227/0374; F17C2227/0376; F17C2227/0383; Y; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6552
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1933-08-18 | 1934-02-17 | 1934-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-08-18 | 1938-02-17 | 1938-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-08-18 | 1942-02-17 | 1942-08-19 | $7700.00 | Window Closed / Lapsed |