US2607502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand truck
Assignee: AT&T Inc
•
Filing: 1950-12-06
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Granted: 1952-08-19
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Expires: 1970-12-06
Abstract
No abstract record available.
Inventors
- 👤 William M Willitts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:28
CPC Classifications
B; B62; B62B; B62B3/00; B62B3/008; B62B5/00; B62B5/0083; B62B2202/00; B62B2202/10; B62B2203/00; B62B2203/70; B62B2203/74; B62B5/04; B62B5/0438; B62B5/0485
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US468559A
Cited
US575390A
Cited
US637650A
Cited
US2418522A
Cited
US2506471A
Cited
US2444690A
Cited
US2557183A
Cited
US2556532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |