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US2784979A
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Assignee: Individual
•
Filing: 1955-04-18
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Granted: 1957-03-12
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Expires: 1975-04-18
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Chamberlin
- 👤 Robert A Westphal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:06
CPC Classifications
B; B62; B62B; B62B1/00; B62B1/26; B62B1/266; B62B1/10; B62B2202/00; B62B2202/24; B62B2202/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR965360A
Cited
US1820765A
Cited
US2474373A
Cited
US2639163A
Cited
US2650786A
Cited
US2704165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |