US2809816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mortar mixer
Assignee: Individual
•
Filing: 1954-07-26
•
Granted: 1957-10-15
•
Expires: 1974-07-26
Abstract
No abstract record available.
Inventors
- 👤 Ulysses D Whitehead
- 👤 Samuel B Oren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:27
CPC Classifications
B; B28; B28C; B28C5/00; B28C5/08; B28C5/10; B28C5/12; B28C5/16; B28C5/163
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US903042A
Cited
US1197114A
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US1344836A
Cited
US1735143A
Cited
US1708947A
Cited
US2005950A
Cited
US2517149A
Cited
US2576492A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |