US2859488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stands
Assignee: Individual
•
Filing: 1957-03-07
•
Granted: 1958-11-11
•
Expires: 1977-03-07
Abstract
No abstract record available.
Inventors
- 👤 Mackintosh Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:42
CPC Classifications
E; E04; E04H; E04H3/00; E04H3/10; E04H3/12; E04H3/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1320310A
Cited
US820542A
Cited
US868214A
Cited
US1125194A
Cited
US1175939A
Cited
US2471462A
Cited
US2490296A
Cited
US2598983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |