Patent US2749501A successfully refreshed from Google Patents.
US2749501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric voltage regulator
Assignee: Big Heart Pet Brands LLC
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Filing: 1950-10-06
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Granted: 1956-06-05
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Expires: 1970-10-06
Abstract
No abstract record available.
Inventors
- 👤 Harold W Bartlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:07
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2125073A
Cited
US2088466A
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US1944751A
Cited
US1973469A
Cited
US2269324A
Cited
US2412163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |