Patent US2728378A successfully refreshed from Google Patents.
US2728378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
hamilton
Assignee: —
•
Filing: —
•
Granted: 1955-12-27
•
Expires: 1972-12-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:53
CPC Classifications
A; A47; A47D; A47D1/00; A47D1/008; A47D1/0085; A47D1/0081
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1217950A
Cited
US2285845A
Cited
US2522087A
Cited
US2532556A
Cited
US2505490A
Cited
US2531080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |