US1856929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightweight building materials
Assignee: Individual
•
Filing: 1930-11-13
•
Granted: 1932-05-03
•
Expires: 1950-11-13
Abstract
No abstract record available.
Inventors
- 👤 Peck John Sanford
- 👤 Eugene V Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:39
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/02; C04B20/00; C04B20/02; C04B20/04; C04B20/06; C04B20/068; Y; Y10; Y10S; Y10S264/00; Y10S264/39; Y10S264/63
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) | 1935-05-03 | 1935-11-02 | 1936-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-05-03 | 1939-11-02 | 1940-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-05-03 | 1943-11-02 | 1944-05-03 | $7700.00 | Window Closed / Lapsed |