Patent US2224972A successfully refreshed from Google Patents.
US2224972A
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Assignee: Individual
•
Filing: 1939-03-22
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Granted: 1940-12-17
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Expires: 1959-03-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward B Long
- 👤 Carpenter Howard Field
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:15
CPC Classifications
A; A45; A45F; A45F5/00; A45F5/02; A45F5/1558; Y; Y10; Y10T; Y10T24/00; Y10T24/13; Y10T24/1379; Y10T24/1397; Y10T24/34; Y10T24/3427; Y10T24/3449; Y10T24/39; Y10T24/3902; Y10T24/3904; Y10T24/47; Y10T24/4755; Y10T70/00; Y10T70/80; Y10T70/8432; Y10T70/8676; Y10T70/8703
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) | 1943-12-17 | 1944-06-17 | 1944-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-17 | 1948-06-17 | 1948-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-17 | 1952-06-17 | 1952-12-17 | $7700.00 | Window Closed / Lapsed |