Patent US2991097A successfully refreshed from Google Patents.
US2991097A
Expired / Lapsed
US
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Connecting structure for beams of a roof support or the like
Assignee: Individual
•
Filing: 1955-05-23
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Granted: 1961-07-04
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Expires: 1975-05-23
Abstract
No abstract record available.
Inventors
- 👤 Vanwersch Aloys
- 👤 Vanwersch Peter
- 👤 Vanwersch Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:14
CPC Classifications
E; E21; E21D; E21D17/00; E21D17/02; E21D17/08; E21D17/086; E21D15/00; E21D15/14; E21D15/28; E21D15/43; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32262; Y10T403/32319
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1275457A
Cited
US2554210A
Cited
NL70945C
Cited
DE827050C
Cited
FR1009905A
Cited
NL74988C
Cited
BE502749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |