US1333759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating-grating
Assignee: Individual
•
Filing: 1919-11-07
•
Granted: 1920-03-16
•
Expires: 1939-11-07
Abstract
No abstract record available.
Inventors
- 👤 Fred Van Kooy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:09
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/42; E04C2/421; E04C2/422
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) | 1923-03-16 | 1923-09-15 | 1924-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-03-16 | 1927-09-15 | 1928-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-03-16 | 1931-09-15 | 1932-03-16 | $7700.00 | Window Closed / Lapsed |