US2137994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic product and process of making the same
Assignee: Mantle Lamp Company of America
•
Filing: 1931-08-20
•
Granted: 1938-11-22
•
Expires: 1951-08-20
Abstract
No abstract record available.
Inventors
- 👤 Allen D Whipple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:53
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26
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) | 1941-11-21 | 1942-05-23 | 1942-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-11-21 | 1946-05-23 | 1946-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-11-21 | 1950-05-23 | 1950-11-22 | $7700.00 | Window Closed / Lapsed |