Patent US2702498A successfully refreshed from Google Patents.
US2702498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
arthur
Assignee: —
•
Filing: —
•
Granted: 1955-02-22
•
Expires: 1972-02-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:21
CPC Classifications
E; E01; E01C; E01C9/00; E01C9/08; E01C9/083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1159657A
Cited
US1269268A
Cited
US1772821A
Cited
US2338785A
Cited
US2294549A
Cited
US2315180A
Cited
US2361163A
Cited
US2361164A
Cited
US2323272A
Cited
US2599634A
Cited
US2645167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-21 | 1958-08-23 | 1959-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-21 | 1962-08-23 | 1963-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-21 | 1966-08-23 | 1967-02-22 | $7700.00 | Window Closed / Lapsed |