US2578247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic door for nests
Assignee: Individual
•
Filing: 1949-03-28
•
Granted: 1951-12-11
•
Expires: 1969-03-28
Abstract
No abstract record available.
Inventors
- 👤 William P Hofferbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:02
CPC Classifications
A; A01; A01K; A01K31/00; A01K31/14; A01K31/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US264293A
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US271318A
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US1105403A
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US938603A
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US1229164A
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US1994208A
Cited
US2105879A
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US2118189A
Cited
US2299680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |