Patent DE373811C successfully refreshed from Google Patents.
US2319679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of acetylene by regenerative type of pyrolysis
Assignee: Wulff Process Co
•
Filing: 1942-04-27
•
Granted: 1943-05-18
•
Expires: 1962-04-27
Abstract
No abstract record available.
Inventors
- 👤 Hasche Rudolph Leonard
- 👤 William B Hincke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:15
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/02; C07C4/04; C10; C10G; C10G9/00; C10G9/26; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/905; Y10S585/919; Y10S585/921; Y10S585/924; Y10S585/925
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) | 1946-05-17 | 1946-11-16 | 1947-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-05-17 | 1950-11-16 | 1951-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-05-17 | 1954-11-16 | 1955-05-18 | $7700.00 | Window Closed / Lapsed |