US2820475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storm door release valve
Assignee: Individual
•
Filing: 1955-01-28
•
Granted: 1958-01-21
•
Expires: 1975-01-28
Abstract
No abstract record available.
Inventors
- 👤 Rodney C Hobbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:06
CPC Classifications
F; F16; F16K; F16K24/00; E; E06; E06B; E06B5/00; E06B5/003; F16K15/00; F16K15/02; F16K15/06; F16K15/063; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6966; Y10T137/6969; Y10T137/7722; Y10T137/7771; Y10T137/7779; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7925; Y10T137/7929; Y10T137/7931
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US144844A
Cited
US287007A
Cited
US684565A
Cited
US770088A
Cited
US1462519A
Cited
US2155124A
Cited
US2316480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |