Patent US3412935A successfully refreshed from Google Patents.
US3412935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas dispensing devices
Assignee: United States Department of Agriculture
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Filing: 1966-08-31
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Granted: 1968-11-26
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Expires: 1986-08-31
Abstract
No abstract record available.
Inventors
- 👤 Andrew E O'keeffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:39
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0006; B; B01; B01J; B01J4/00; B01J4/02; C; C02; C02F; C02F1/00; C02F1/72; C02F1/76; C02F1/763; G05; G05D; G05D11/00; G05D11/006
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) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |