US2809070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grapples
Assignee: AT&T Inc
•
Filing: 1955-02-28
•
Granted: 1957-10-08
•
Expires: 1975-02-28
Abstract
No abstract record available.
Inventors
- 👤 Stanley C Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:02
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/42; B66C1/44; B66C1/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1317500A
Cited
US1443853A
Cited
US1477687A
Cited
US1534039A
Cited
US1529553A
Cited
US1734360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |