US1821237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control mechanism
Assignee: MEAD PULP AND PAPER Co
•
Filing: 1928-04-27
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Granted: 1931-09-01
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Expires: 1948-04-27
Abstract
No abstract record available.
Inventors
- 👤 Francis G Rawling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:45
CPC Classifications
D; D21; D21C; D21C7/00; D21C7/12; D21C9/00; D21C9/10; D21C9/1026; D21C9/1052; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0396; Y10T137/2496; Y10T137/2499; Y10T137/2713; Y10T137/2842; Y10T137/2931; Y10T137/2934; Y10T137/3003; Y10T137/3084; Y10T137/3087; Y10T137/4456; Y10T137/7287; Y10T137/7313; Y10T137/7339; Y10T137/7342; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7781; Y10T137/7784; Y10T137/7787
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) | 1934-08-31 | 1935-03-02 | 1935-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-08-31 | 1939-03-02 | 1939-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-08-31 | 1943-03-02 | 1943-09-01 | $7700.00 | Window Closed / Lapsed |