US2574493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Classifier and separator
Assignee: Individual
•
Filing: 1949-04-18
•
Granted: 1951-11-13
•
Expires: 1969-04-18
Abstract
No abstract record available.
Inventors
- 👤 Mclean Lyle Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:36
CPC Classifications
B; B03; B03B; B03B4/00; B03B4/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US895363A
Cited
US1534846A
Cited
US1822840A
Cited
US1831524A
Cited
US2007190A
Cited
US2086584A
Cited
GB455219A
Cited
US2074977A
Cited
US2275849A
Cited
US2303367A
Cited
US2332183A
Cited
US2445251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |