US2243897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetical production of paraffin
Assignee: HYDROCARBON SYNTHESIS Corp
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Filing: 1938-07-23
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Granted: 1941-06-03
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Expires: 1958-07-23
Abstract
No abstract record available.
Inventors
- 👤 Fischer Franz
- 👤 Pichler Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:37
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04
Claims Analysis
Total Claims: 0
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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) | 1944-06-02 | 1944-12-02 | 1945-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-02 | 1948-12-02 | 1949-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-02 | 1952-12-02 | 1953-06-03 | $7700.00 | Window Closed / Lapsed |