Patent US1900328A successfully refreshed from Google Patents.
US1900328A
Expired / Lapsed
US
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Automatic door tightener
Assignee: Individual
•
Filing: 1932-03-08
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Granted: 1933-03-07
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Expires: 1952-03-08
Abstract
No abstract record available.
Inventors
- 👤 Boggs Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:58
CPC Classifications
E; E05; E05C; E05C5/00; E05C5/02; E05C5/04; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0863; Y10T292/0867; Y10T292/0868; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0971; Y10T292/1039; Y10T292/10395; Y10T292/104
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) | 1936-03-06 | 1936-09-05 | 1937-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-03-06 | 1940-09-05 | 1941-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-03-06 | 1944-09-05 | 1945-03-07 | $7700.00 | Window Closed / Lapsed |