US2994433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roof draining sinks
Assignee: Individual
•
Filing: 1957-12-30
•
Granted: 1961-08-01
•
Expires: 1977-12-30
Abstract
No abstract record available.
Inventors
- 👤 Sandin Nils Lennart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:51
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/04; E04D13/0404; E04D13/0409; E04D2013/0436
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US889051A
Cited
US1143174A
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US1434254A
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US1584453A
Cited
US1762838A
Cited
US1991772A
Cited
US2283160A
Cited
GB623464A
Cited
US2615526A
Cited
US2837212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |