US2819796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
edwards
Assignee: —
•
Filing: —
•
Granted: 1958-01-14
•
Expires: 1975-01-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:47
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/28; B07B1/46; B07B1/42; B07B1/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1005900A
Cited
US2053341A
Cited
US1971156A
Cited
DE668069C
Cited
US2178813A
Cited
US2225909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |