Patent US1152772A successfully refreshed from Google Patents.
Patent US3941014A successfully refreshed from Google Patents.
Patent US4069870A successfully refreshed from Google Patents.
Patent US4285804A successfully refreshed from Google Patents.
Patent NL57807C successfully refreshed from Google Patents.
Patent US2864553A successfully refreshed from Google Patents.
← Back to Patent Explorer
US2864553A Expired / Lapsed US ⏱️ 0.0 years remaining

Mailbox signal

Assignee: Individual
•
Filing: 1958-03-31
•
Granted: 1958-12-16
•
Expires: 1978-03-31
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

No abstract record available.

Inventors

  • 👤 Wilbur A Petrie

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 01:35
CPC Classifications
A; A47; A47G; A47G29/00; A47G29/12; A47G29/1209; A47G29/121; A47G2029/12105

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

References Cited (Backward Citations)

US870654A Cited
US879022A Cited
US1562536A Cited
US2475098A Cited
US2480469A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1961-12-15 1962-06-16 1962-12-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1965-12-15 1966-06-16 1966-12-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1969-12-15 1970-06-16 1970-12-16 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag