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US2370749A
Expired / Lapsed
US
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Interchangeable typewriter carton
Assignee: Individual
•
Filing: 1943-02-01
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Granted: 1945-03-06
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Expires: 1963-02-01
Abstract
No abstract record available.
Inventors
- 👤 Perkins Leon Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:20
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/42; B65D5/44; B65D5/50; B65D5/5028; B65D5/5035; B65D5/5045; B65D5/5059; B65D2585/00; B65D2585/68; B65D2585/6802; B65D2585/689; B65D2585/6895
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-03-05 | 1948-09-04 | 1949-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-03-05 | 1952-09-04 | 1953-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-03-05 | 1956-09-04 | 1957-03-06 | $7700.00 | Window Closed / Lapsed |