US2722166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quadruple staying machine
Assignee: Individual
•
Filing: 1951-07-18
•
Granted: 1955-11-01
•
Expires: 1971-07-18
Abstract
No abstract record available.
Inventors
- 👤 Keller Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:17
CPC Classifications
B; B31; B31B; B31B50/00; B31B50/60; B31B50/72; B31B50/26; B31B50/44; B31B50/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US728086A
Cited
US1131199A
Cited
US1154969A
Cited
US1965274A
Cited
US1988814A
Cited
US2082365A
Cited
US2321562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-31 | 1959-05-02 | 1959-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-31 | 1963-05-02 | 1963-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-31 | 1967-05-02 | 1967-11-01 | $7700.00 | Window Closed / Lapsed |