US1244840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extraction of hydrocarbon products from shales and coals.
Assignee: VERNER Z REED
•
Filing: 1916-12-01
•
Granted: 1917-10-30
•
Expires: 1936-12-01
Abstract
No abstract record available.
Inventors
- 👤 David T Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:21
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/34; C10G9/36; C10G9/38
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) | 1920-10-29 | 1921-04-30 | 1921-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-10-29 | 1925-04-30 | 1925-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-10-29 | 1929-04-30 | 1929-10-30 | $7700.00 | Window Closed / Lapsed |