US2557930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joint
Assignee: Individual
•
Filing: 1947-06-12
•
Granted: 1951-06-26
•
Expires: 1967-06-12
Abstract
No abstract record available.
Inventors
- 👤 Francis N Bard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:05
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/02; F16L27/04; F16L27/042; F16L27/06; F16L27/073; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49938; Y10T29/4994
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US807768A
Cited
US871757A
Cited
US1001117A
Cited
US954177A
Cited
US1034965A
Cited
US2421691A
Cited
US2388633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |