US2871891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control for bag filling machine
Assignee: Black Products Co
•
Filing: 1954-05-28
•
Granted: 1959-02-03
•
Expires: 1974-05-28
Abstract
No abstract record available.
Inventors
- 👤 Erwin M Lau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:34
CPC Classifications
B; B65; B65B; B65B1/00; B65B1/04; B65B1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2345287A
Cited
US2548075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |