US1968203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shutter means for gas burners
Assignee: Individual
•
Filing: 1930-06-13
•
Granted: 1934-07-31
•
Expires: 1950-06-13
Abstract
No abstract record available.
Inventors
- 👤 Philip S Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:47
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/62; F23D14/64; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87571; Y10T137/87587; Y10T137/87619; Y10T137/87627; Y10T137/87676; Y10T137/87684
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) | 1937-07-30 | 1938-01-29 | 1938-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-07-30 | 1942-01-29 | 1942-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-07-30 | 1946-01-29 | 1946-07-31 | $7700.00 | Window Closed / Lapsed |