US2556618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core blower
Assignee: HARRISON MACHINE Co
•
Filing: 1948-08-18
•
Granted: 1951-06-12
•
Expires: 1968-08-18
Abstract
No abstract record available.
Inventors
- 👤 Charles P Harrison
- 👤 Charles R Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:12
CPC Classifications
B; B22; B22C; B22C15/00; B22C15/23; B22C15/24; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2191451A
Cited
US819883A
Cited
US1086824A
Cited
US1373794A
Cited
US1387769A
Cited
US1703708A
Cited
US1866301A
Cited
US1994028A
Cited
US1808630A
Cited
DE543832C
Cited
US1927571A
Cited
DE712914C
Cited
US2334878A
Cited
US2423341A
Cited
US2468672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |