Patent US2231029A successfully refreshed from Google Patents.
US2231029A
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US
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Filing apparatus
Assignee: SCHOLFIELD SERVICE Inc
•
Filing: 1936-04-22
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Granted: 1941-02-11
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Expires: 1956-04-22
Abstract
No abstract record available.
Inventors
- 👤 Richard P Scholfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:15
CPC Classifications
B; B42; B42F; B42F17/00; B42F17/28; Y; Y10; Y10S; Y10S402/00; Y10S402/501
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) | 1944-02-11 | 1944-08-12 | 1945-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-11 | 1948-08-12 | 1949-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-11 | 1952-08-12 | 1953-02-11 | $7700.00 | Window Closed / Lapsed |