US1177320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hollow grate-bars.
Assignee: Individual
•
Filing: 1915-06-29
•
Granted: 1916-03-28
•
Expires: 1935-06-29
Abstract
No abstract record available.
Inventors
- 👤 Robert Grabowsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:11
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49391; Y10T29/49826; Y10T29/49879
Claims Analysis
Total Claims: 0
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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) | 1919-03-28 | 1919-09-27 | 1920-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1923-03-28 | 1923-09-27 | 1924-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1927-03-28 | 1927-09-27 | 1928-03-28 | $7700.00 | Window Closed / Lapsed |