US2909254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roof scuttle
Assignee: Individual
•
Filing: 1953-02-12
•
Granted: 1959-10-20
•
Expires: 1973-02-12
Abstract
No abstract record available.
Inventors
- 👤 Edward C Hallock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:40
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/03; E04D13/035; E04D13/0351; E04D13/0354; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0995
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US451616A
Cited
US1015212A
Cited
US1596890A
Cited
US1588351A
Cited
US2060608A
Cited
US2141471A
Cited
US2197150A
Cited
US2231175A
Cited
GB563000A
Cited
US2372369A
Cited
US2543600A
Cited
US2596792A
Cited
US2682323A
Cited
US2670820A
Cited
US2647473A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |