US2777683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
ferguson
Assignee: —
•
Filing: —
•
Granted: 1957-01-15
•
Expires: 1974-01-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:00
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/0056; C21D9/0006; C21D9/0018; C21D9/0062; F; F27; F27D; F27D1/00; F27D1/18; F27D1/1858; F27D3/00; F27D3/0024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1168313A
Cited
US1073235A
Cited
GB191218082A
Cited
US1818759A
Cited
US1888960A
Cited
US1979108A
Cited
US2223603A
Cited
US2254047A
Cited
US2349679A
Cited
US2438064A
Cited
US2639138A
Cited
US2589811A
Cited
US2639047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |