Patent US3046850A successfully refreshed from Google Patents.
US3046850A
Expired / Lapsed
US
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Foldable walkway and storage apparatus therefor
Assignee: Individual
•
Filing: 1958-03-10
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Granted: 1962-07-31
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Expires: 1978-03-10
Abstract
No abstract record available.
Inventors
- 👤 Clair W Tellefson
- 👤 Charles E Smith
- 👤 Melvin E Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:38
CPC Classifications
B; B65; B65G; B65G69/00; B65G69/28; B65G69/30; B61; B61D; B61D23/00; B61D23/02; B64; B64F; B64F1/00; B64F1/30; B64F1/315
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US430935A
Cited
US713561A
Cited
AT49916B
Cited
US960022A
Cited
FR785137A
Cited
US2344772A
Cited
US2700169A
Cited
US2771136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |