Patent US2834540A successfully refreshed from Google Patents.
US2834540A
Expired / Lapsed
US
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Door-opening attachment for ruraltype mailboxes
Assignee: Individual
•
Filing: 1957-08-27
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Granted: 1958-05-13
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Expires: 1977-08-27
Abstract
No abstract record available.
Inventors
- 👤 Peter D Hudgins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:13
CPC Classifications
A; A47; A47G; A47G29/00; A47G29/12; A47G29/1209; A47G29/121
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US918899A
Cited
US995845A
Cited
US1141806A
Cited
US1209550A
Cited
US1792821A
Cited
US2416696A
Cited
US2808982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |