Patent US1595722A successfully refreshed from Google Patents.
US1595722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-acting hydraulic doorcheck
Assignee: NORTON DOOR CLOSER Co
•
Filing: 1922-11-10
•
Granted: 1926-08-10
•
Expires: 1942-11-10
Abstract
No abstract record available.
Inventors
- 👤 Lewis C Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:23
CPC Classifications
E; E05; E05F; E05F3/00; E05F3/04; E05F3/10; E05F3/102; E05F3/22; E05F3/225; E05Y; E05Y2800/00; E05Y2800/10; E05Y2800/12; E05Y2800/26; E05Y2800/28; Y; Y10; Y10S; Y10S16/00; Y10S16/20; Y10S16/21
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1929-08-09 | 1930-02-08 | 1930-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-08-09 | 1934-02-08 | 1934-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-08-09 | 1938-02-08 | 1938-08-10 | $7700.00 | Window Closed / Lapsed |