Patent US1671995A successfully refreshed from Google Patents.
US1671995A
Expired / Lapsed
US
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Composition construction
Assignee: Individual
•
Filing: 1927-10-01
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Granted: 1928-06-05
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Expires: 1947-10-01
Abstract
No abstract record available.
Inventors
- 👤 William K Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:44
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/14; E04B2/24; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249967; Y10T428/249968; Y10T428/26; Y10T428/266; Y10T428/27; Y10T428/273; Y10T428/31504; Y10T428/31801; Y10T428/31815
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) | 1931-06-05 | 1931-12-05 | 1932-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-06-05 | 1935-12-05 | 1936-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-06-05 | 1939-12-05 | 1940-06-05 | $7700.00 | Window Closed / Lapsed |