US2851759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Installation for hydraulic lifting of sliding shutterings
Assignee: Individual
•
Filing: 1953-11-09
•
Granted: 1958-09-16
•
Expires: 1973-11-09
Abstract
No abstract record available.
Inventors
- 👤 Berntsen Trygve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:30
CPC Classifications
E; E04; E04G; E04G11/00; E04G11/06; E04G11/20; E04G11/22; E04G11/24; Y; Y10; Y10T; Y10T137/00; Y10T137/7722
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1730727A
Cited
US2398152A
Cited
US2516318A
Cited
US2596854A
Cited
US2673067A
Cited
US2673064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |