US1543841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-control system
Assignee: Kellogg Switchboard and Supply Co
•
Filing: 1923-07-02
•
Granted: 1925-06-30
•
Expires: 1943-07-02
Abstract
No abstract record available.
Inventors
- 👤 Henry J Grigoleit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:13
CPC Classifications
B; B21; B21J; B21J9/00; B21J9/10; B21J9/20; B21J9/12; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2579; Y10T137/2582; Y10T137/2605; Y10T137/8593; Y10T137/85978; Y10T137/86035; Y10T137/86043; Y10T137/87265; Y10T137/8741
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) | 1928-06-29 | 1928-12-29 | 1929-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-06-29 | 1932-12-29 | 1933-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-06-29 | 1936-12-29 | 1937-06-30 | $7700.00 | Window Closed / Lapsed |