US1638668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skylight
Assignee: Individual
•
Filing: 1925-05-01
•
Granted: 1927-08-09
•
Expires: 1945-05-01
Abstract
No abstract record available.
Inventors
- 👤 Volk Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:45
CPC Classifications
E; E04; E04B; E04B7/00; E04B7/02; E04B7/06; E04B7/063; E04D; E04D3/00; E04D3/02; E04D3/06; E04D3/08; E04B2007/066; E04D2003/0812; E04D2003/0868; E04D2003/0875; E04D2003/0881
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) | 1930-08-08 | 1931-02-07 | 1931-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-08-08 | 1935-02-07 | 1935-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-08-08 | 1939-02-07 | 1939-08-09 | $7700.00 | Window Closed / Lapsed |