Patent US1638516A successfully refreshed from Google Patents.
US1638516A
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US
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Spring
Assignee: FRED E MAXFIELD
•
Filing: 1925-12-26
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Granted: 1927-08-09
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Expires: 1945-12-26
Abstract
No abstract record available.
Inventors
- 👤 Charles I Ware
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:44
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/02; F16F1/18; F16F1/20; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939; Y10S428/94; Y10T; Y10T29/00; Y10T29/49; Y10T29/49609; Y10T29/49611; Y10T428/00; Y10T428/12; Y10T428/12451; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/12958; Y10T428/12986; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2951
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) | 1930-08-08 | 1931-02-07 | 1931-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-08-08 | 1935-02-07 | 1935-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-08-08 | 1939-02-07 | 1939-08-09 | $7700.00 | Window Closed / Lapsed |