US2928144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frame structures
Assignee: Individual
•
Filing: 1959-01-23
•
Granted: 1960-03-15
•
Expires: 1979-01-23
Abstract
No abstract record available.
Inventors
- 👤 Persson Eric Sigfrid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:13
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/04; E06B3/263; E06B3/26336; E06B3/54; E06B3/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2122209A
Cited
US2207745A
Cited
US2264187A
Cited
US2622710A
Cited
US2725606A
Cited
US2728116A
Cited
US2872713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |