US2438351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible collapsible fluid bladder
Assignee: Individual
•
Filing: 1945-05-23
•
Granted: 1948-03-23
•
Expires: 1965-05-23
Abstract
No abstract record available.
Inventors
- 👤 Abraham N Spanel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:46
CPC Classifications
B; B63; B63C; B63C9/00; B63C9/24; A; A63; A63H; A63H27/00; A63H27/10; A63H2027/1041; A63H2027/1083; Y; Y10; Y10S; Y10S383/00; Y10S383/904; Y10S383/906
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) | 1951-03-23 | 1951-09-22 | 1952-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-23 | 1955-09-22 | 1956-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-23 | 1959-09-22 | 1960-03-23 | $7700.00 | Window Closed / Lapsed |