US2975985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinders
Assignee: Grundler Crusher and Pulverizer Co
•
Filing: 1958-02-12
•
Granted: 1961-03-21
•
Expires: 1978-02-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry J Shelton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:21
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/26; B02C13/282; B02C13/284
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US877689A
Cited
US1185620A
Cited
US1560049A
Cited
US1889183A
Cited
US2227090A
Cited
US2669396A
Cited
US2554071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |