US638247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamp-wick and method of manufacture.
Assignee: Individual
•
Filing: 1899-03-20
•
Granted: 1899-12-05
•
Expires: 1919-03-20
Abstract
No abstract record available.
Inventors
- 👤 John W Hyatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:23
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/14; F16L11/16
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) | 1902-12-05 | 1903-06-06 | 1903-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1906-12-05 | 1907-06-06 | 1907-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1910-12-05 | 1911-06-06 | 1911-12-06 | $7700.00 | Window Closed / Lapsed |