Patent US1002027A successfully refreshed from Google Patents.
US1002027A
Expired / Lapsed
US
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Pneumatic door-operating mechanism.
Assignee: National Pneumatic Co Inc
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Filing: 1909-03-12
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Granted: 1911-08-29
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Expires: 1929-03-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:19
CPC Classifications
F; F04; F04B; F04B27/00; F04B27/04; F04B27/0404; F04B27/0451; F04B27/0456; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/1043; Y10T292/1075; Y10T292/1082
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) | 1914-08-28 | 1915-02-27 | 1915-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1918-08-28 | 1919-02-27 | 1919-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1922-08-28 | 1923-02-27 | 1923-08-29 | $7700.00 | Window Closed / Lapsed |