Patent US660251A successfully refreshed from Google Patents.
US660251A
Expired / Lapsed
US
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Apparatus for separating wax from paraffin-oil.
Assignee: Individual
•
Filing: 1899-12-02
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Granted: 1900-10-23
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Expires: 1919-12-02
Abstract
No abstract record available.
Inventors
- 👤 Philander R Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:27
CPC Classifications
F; F28; F28F; F28F19/00; F28F19/008; Y; Y10; Y10S; Y10S165/00; Y10S165/076; Y10S165/081; Y10S165/09
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) | 1903-10-23 | 1904-04-23 | 1904-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-10-23 | 1908-04-23 | 1908-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-10-23 | 1912-04-23 | 1912-10-23 | $7700.00 | Window Closed / Lapsed |