US2784779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible wind-break
Assignee: Individual
•
Filing: 1954-12-27
•
Granted: 1957-03-12
•
Expires: 1974-12-27
Abstract
No abstract record available.
Inventors
- 👤 Stearl E Knipfer
- 👤 Lajza Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:35
CPC Classifications
E; E04; E04H; E04H15/00; E04H15/003; Y; Y10; Y10T; Y10T24/00; Y10T24/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US696044A
Cited
US1280291A
Cited
US1974377A
Cited
US2532378A
Cited
US2576384A
Cited
US2622298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |