US1905541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fireproof wall board
Assignee: Individual
•
Filing: 1932-05-05
•
Granted: 1933-04-25
•
Expires: 1952-05-05
Abstract
No abstract record available.
Inventors
- 👤 John A Wiener
- 👤 John B Harmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:21
CPC Classifications
D; D21; D21J; D21J1/00; Y; Y10; Y10S; Y10S106/00; Y10S106/03; Y10S428/00; Y10S428/92; Y10S428/921
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) | 1936-04-24 | 1936-10-24 | 1937-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-04-24 | 1940-10-24 | 1941-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-04-24 | 1944-10-24 | 1945-04-25 | $7700.00 | Window Closed / Lapsed |