US2677473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Postal sorting apparatus
Assignee: HALL TELEPHONE ACCESSORIES Ltd
•
Filing: 1951-08-09
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Granted: 1954-05-04
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Expires: 1971-08-09
Abstract
No abstract record available.
Inventors
- 👤 Piggott John
- 👤 Whillock Arthur Frederick
- 👤 Marriott Paul Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:08
CPC Classifications
B; B07; B07C; B07C3/00; B07C3/02; B07C3/08; Y; Y10; Y10S; Y10S209/00; Y10S209/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1295432A
Cited
GB632403A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |