US2788988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailer implement frame construction for tractor drawn and powered implements
Assignee: Unisys Corp
•
Filing: 1952-09-17
•
Granted: 1957-04-16
•
Expires: 1972-09-17
Abstract
No abstract record available.
Inventors
- 👤 Melvin J Happe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:11
CPC Classifications
A; A01; A01B; A01B51/00; A01B51/04; A01D; A01D43/00; A01D43/10; A01D43/107; Y; Y10; Y10S; Y10S56/00; Y10S56/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1106104A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |