US1812376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory heat insulating material
Assignee: Individual
•
Filing: 1927-07-26
•
Granted: 1931-06-30
•
Expires: 1947-07-26
Abstract
No abstract record available.
Inventors
- 👤 Donald W Ross
- 👤 James M Lambie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:23
CPC Classifications
C; C04; C04B; C04B38/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249967; Y10T428/249969; Y10T428/249971; Y10T428/249973; Y10T428/249986
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) | 1934-06-29 | 1934-12-29 | 1935-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-06-29 | 1938-12-29 | 1939-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-06-29 | 1942-12-29 | 1943-06-30 | $7700.00 | Window Closed / Lapsed |