Patent US2780048A successfully refreshed from Google Patents.
US2780048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
hurst
Assignee: —
•
Filing: —
•
Granted: 1957-02-05
•
Expires: 1974-02-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:25
CPC Classifications
D; D01; D01H; D01H7/00; D01H7/02; D01H7/52; D01H7/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE305608C
Cited
US1713938A
Cited
US651650A
Cited
US1226661A
Cited
FR654350A
Cited
US1880084A
Cited
US2132260A
Cited
US2718748A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |