US2750871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extractor
Assignee: TOLAN MACHINERY CO Inc
•
Filing: 1953-10-15
•
Granted: 1956-06-19
•
Expires: 1973-10-15
Abstract
No abstract record available.
Inventors
- 👤 Sr Fred A Landgraber
- 👤 John M Tolpa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:33
CPC Classifications
A; A47; A47J; A47J31/00; A47J31/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US373420A
Cited
GB190227602A
Cited
US918765A
Cited
US1075727A
Cited
US1187419A
Cited
US1344102A
Cited
US1535769A
Cited
US2139881A
Cited
US2273037A
Cited
US2398314A
Cited
US2447692A
Cited
US2578179A
Cited
US2644758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-19 | 1959-12-19 | 1960-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-19 | 1963-12-19 | 1964-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-19 | 1967-12-19 | 1968-06-19 | $7700.00 | Window Closed / Lapsed |