US2661977A
Expired / Lapsed
US
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Assignee: Emhart Industries Inc
•
Filing: 1952-03-06
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Granted: 1953-12-08
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Expires: 1972-03-06
Abstract
No abstract record available.
Inventors
- 👤 Nicholas A Welch
- 👤 William J Zeigenhein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:00
CPC Classifications
E; E05; E05C; E05C3/00; E05C3/12; E05C3/16; E05C3/165; E05C3/124; Y; Y10; Y10T; Y10T292/00; Y10T292/57; Y10T292/62; Y10T70/00; Y10T70/80; Y10T70/8432; Y10T70/8459; Y10T70/8514
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US790092A
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US833198A
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US849569A
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US949613A
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US943899A
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US1484500A
Cited
US1719282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |