US747872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic track-gage.
Assignee: Individual
•
Filing: 1903-05-16
•
Granted: 1903-12-22
•
Expires: 1923-05-16
Abstract
No abstract record available.
Inventors
- 👤 Thaddeus Ellis
- 👤 George Herndon Purvis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:35
CPC Classifications
E; E01; E01B; E01B35/00; E01B35/02; E01B35/04; E01B2203/00; E01B2203/16
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) | 1906-12-21 | 1907-06-22 | 1907-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1910-12-21 | 1911-06-22 | 1911-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1914-12-21 | 1915-06-22 | 1915-12-22 | $7700.00 | Window Closed / Lapsed |