Patent US2833503A successfully refreshed from Google Patents.
US2833503A
Expired / Lapsed
US
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Platform support apparatus
Assignee: Individual
•
Filing: 1955-04-18
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Granted: 1958-05-06
•
Expires: 1975-04-18
Abstract
No abstract record available.
Inventors
- 👤 Lynn B Harshbarger
- 👤 Paul E Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:09
CPC Classifications
E; E04; E04G; E04G5/00; E04G5/06; E04G5/062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US95815A
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US107706A
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US609287A
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US1114997A
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US1456940A
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US1698607A
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US2264498A
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US2332477A
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US2577979A
Cited
US2641429A
Cited
US2573086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |