US1211235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust-collector.
Assignee: Individual
•
Filing: 1916-06-15
•
Granted: 1917-01-02
•
Expires: 1936-06-15
Abstract
No abstract record available.
Inventors
- 👤 William M Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:43
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/021; F01N3/023; F01N3/027
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) | 1920-01-02 | 1920-07-03 | 1921-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-01-02 | 1924-07-03 | 1925-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-01-02 | 1928-07-03 | 1929-01-02 | $7700.00 | Window Closed / Lapsed |