US3049248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable batching plant
Assignee: HELTZEL STEEL FORM AND IRON CO
•
Filing: 1959-01-08
•
Granted: 1962-08-14
•
Expires: 1979-01-08
Abstract
No abstract record available.
Inventors
- 👤 Carl J Heltzel
- 👤 Ernest A Gardner
- 👤 William J Kirchner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:04
CPC Classifications
B; B28; B28C; B28C7/00; B28C7/04; B28C7/0481; B28C7/0486; B28C7/049
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1802340A
Cited
US1915758A
Cited
US2190724A
Cited
US2310592A
Cited
US2477790A
Cited
US2867336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |