US2839852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring biased self-opening gate
Assignee: Individual
•
Filing: 1955-04-04
•
Granted: 1958-06-24
•
Expires: 1975-04-04
Abstract
No abstract record available.
Inventors
- 👤 Henry C Schloer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:35
CPC Classifications
E; E06; E06B; E06B11/00; E06B11/02; E06B11/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US475132A
Cited
US920492A
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US1059916A
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US1226213A
Cited
US1329022A
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US2563894A
Cited
US2529386A
Cited
US2713737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |