Patent US1228012A successfully refreshed from Google Patents.
US1228012A
Expired / Lapsed
US
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Door-closing mechanism.
Assignee: Individual
•
Filing: 1915-09-01
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Granted: 1917-05-29
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Expires: 1935-09-01
Abstract
No abstract record available.
Inventors
- 👤 Charles Forth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:06
CPC Classifications
E; E05; E05F; E05F3/00; E05F3/22; E05F3/16; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; Y; Y10; Y10S; Y10S16/00; Y10S16/17; Y10T; Y10T292/00; Y10T292/28; Y10T292/282
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) | 1920-05-28 | 1920-11-27 | 1921-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-05-28 | 1924-11-27 | 1925-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-05-28 | 1928-11-27 | 1929-05-29 | $7700.00 | Window Closed / Lapsed |