US2835501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1955-01-24
•
Granted: 1958-05-20
•
Expires: 1975-01-24
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Chamberlin
- 👤 Robert A Westphal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:48
CPC Classifications
B; B62; B62B; B62B1/00; B62B1/10; B62B1/12; B62B1/008; B62B2202/00; B62B2202/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR623169A
Cited
US1883585A
Cited
FR906027A
Cited
US2395275A
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US2407385A
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US2582435A
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US2626814A
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US2772890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |