US2500330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grille
Assignee: Individual
•
Filing: 1947-01-13
•
Granted: 1950-03-14
•
Expires: 1967-01-13
Abstract
No abstract record available.
Inventors
- 👤 Hugh I Stover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:06
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US120912A
Cited
GB107112A
Cited
US1708243A
Cited
US1718754A
Cited
US1872599A
Cited
US2034231A
Cited
US2090908A
Cited
GB533139A
Cited
US2310843A
Cited
US2349544A
Cited
US2395319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |