US1458522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed trough for glass furnaces
Assignee: Individual
•
Filing: 1920-05-27
•
Granted: 1923-06-12
•
Expires: 1940-05-27
Abstract
No abstract record available.
Inventors
- 👤 Walter G Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:21
CPC Classifications
C; C03; C03B; C03B7/00; C03B7/08; C03B7/094; C03B7/096; C03B7/098; C03B7/005; C03B7/02; C03B7/06; C03B7/07
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) | 1926-06-11 | 1926-12-11 | 1927-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-06-11 | 1930-12-11 | 1931-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-06-11 | 1934-12-11 | 1935-06-12 | $7700.00 | Window Closed / Lapsed |