Patent US2470040A successfully refreshed from Google Patents.
US2470040A
Expired / Lapsed
US
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Collapsible perambulator
Assignee: Individual
•
Filing: 1945-06-29
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Granted: 1949-05-10
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Expires: 1965-06-29
Abstract
No abstract record available.
Inventors
- 👤 James D Mackin
- 👤 Erick W Bergmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:05
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/24; B60N2/26; B60N2/28; B60N2/283; B60N2/2833; B62; B62B; B62B7/00; B62B7/04; B62B7/06; B62B7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US319524A
Cited
US655787A
Cited
US1124155A
Cited
US1140085A
Cited
GB222654A
Cited
GB265891A
Cited
US2314659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |