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Patent US2820670A successfully refreshed from Google Patents.
US2820670A
Expired / Lapsed
US
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Valve arrangement for heat-fusible material spray guns
Assignee: Metallizing Engineering Co Inc
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Filing: 1956-04-13
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Granted: 1958-01-21
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Expires: 1976-04-13
Abstract
No abstract record available.
Inventors
- 👤 Charlop Herbert
- 👤 Arthur P Shepard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:23
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/16; B05B7/20; B05B7/201; B05B7/205; B05B7/206; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20636; Y10T74/20666
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |