Patent US2891397A successfully refreshed from Google Patents.
US2891397A
Expired / Lapsed
US
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Trellis
Assignee: Individual
•
Filing: 1955-12-05
•
Granted: 1959-06-23
•
Expires: 1975-12-05
Abstract
No abstract record available.
Inventors
- 👤 Hauer Erwin Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:07
CPC Classifications
E; E04; E04C; E04C1/00; E04C1/39; E04C1/395; Y; Y10; Y10S; Y10S52/00; Y10S52/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US924153A
Cited
GB191015641A
Cited
US1412504A
Cited
US2115264A
Cited
FR933711A
Cited
US2546494A
Cited
US2709975A
Cited
US2741874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-22 | 1962-12-22 | 1963-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-22 | 1966-12-22 | 1967-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-22 | 1970-12-22 | 1971-06-23 | $7700.00 | Window Closed / Lapsed |