Patent US1168983A successfully refreshed from Google Patents.
US1168983A
Expired / Lapsed
US
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Door-bridge for railway-cars.
Assignee: Individual
•
Filing: 1915-04-16
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Granted: 1916-01-18
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Expires: 1935-04-16
Abstract
No abstract record available.
Inventors
- 👤 Henry Wallingford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:05
CPC Classifications
B; B61; B61D; B61D19/00; B61D19/003; B61D19/005; Y; Y10; Y10S; Y10S16/00; Y10S16/39
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1919-01-17 | 1919-07-19 | 1920-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1923-01-17 | 1923-07-19 | 1924-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1927-01-17 | 1927-07-19 | 1928-01-18 | $7700.00 | Window Closed / Lapsed |