US2643081A
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Assignee: SPRING WOOD PRODUCTS Inc
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Filing: 1950-07-11
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Granted: 1953-06-23
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Expires: 1970-07-11
Abstract
No abstract record available.
Inventors
- 👤 Robert E Spring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:53
CPC Classifications
B; B65; B65D; B65D19/00; B65D19/0004; B65D19/0053; B65D19/0077; B65D19/0089; B65D19/0093; B65D2519/00; B65D2519/00004; B65D2519/00009; B65D2519/00014; B65D2519/00029; B65D2519/00049; B65D2519/00064; B65D2519/00084; B65D2519/00099; B65D2519/00258; B65D2519/00283; B65D2519/00293; B65D2519/00313; B65D2519/00323; B65D2519/00368; B65D2519/00373; B65D2519/00547; B65D2519/00552; B65D2519/00572; B65D2519/00736; B65D2519/00741; B65D2519/00761; B65D2519/0098; B65D2519/00985
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |