Patent US2928322A successfully refreshed from Google Patents.
US2928322A
Expired / Lapsed
US
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Self-propelled multi-purpose percussion unit
Assignee: Individual
•
Filing: 1955-08-22
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Granted: 1960-03-15
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Expires: 1975-08-22
Abstract
No abstract record available.
Inventors
- 👤 Lawrence K Spitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:37
CPC Classifications
E; E02; E02D; E02D7/00; E02D7/02; E02D7/06; E02D7/14; E02D7/16; E01; E01C; E01C23/00; E01C23/06; E01C23/12; E01C23/122; E01C23/124
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2731892A
Cited
US2014631A
Cited
US2096943A
Cited
US2193293A
Cited
US2616267A
Cited
US2659584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |