US2957274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plant starting device
Assignee: Individual
•
Filing: 1957-02-01
•
Granted: 1960-10-25
•
Expires: 1977-02-01
Abstract
No abstract record available.
Inventors
- 👤 James W Colvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:42
CPC Classifications
A; A01; A01G; A01G9/00; A01G9/14; A01G9/16; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/25
Claims Analysis
Total Claims: 0
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US2238818A
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US2739422A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |