US2724328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
boyden etal
Assignee: —
•
Filing: —
•
Granted: 1955-11-22
•
Expires: 1972-11-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:25
CPC Classifications
B; B41; B41K; B41K3/00; B41K3/02; B41K3/04; B41K3/08; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/219
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1391129A
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US1671780A
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US1818338A
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US1936903A
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US2422103A
Cited
US923085A
Cited
US955224A
Cited
US1564634A
Cited
US2340261A
Cited
US2506337A
Cited
US2616365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |