Patent US1998100A successfully refreshed from Google Patents.
US1998100A
Expired / Lapsed
US
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Method of impregnating materials
Assignee: NAT COLD STEAM Co
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Filing: 1928-07-14
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Granted: 1935-04-16
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Expires: 1948-07-14
Abstract
No abstract record available.
Inventors
- 👤 John E Shepherd
- 👤 Raymond D York
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:57
CPC Classifications
B; B27; B27K; B27K3/00; B27K3/02; B27K3/08; B27K3/086; B27K3/0278; B27K3/0285; B27K3/16; B27K3/32; B27K3/34; B27K3/38; B27K3/52; B27K5/00; B27K5/001; C; C04; C04B; C04B41/00; C04B41/45; C04B41/4505; B27K2240/00; B27K2240/30; B27K2240/70
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) | 1938-04-15 | 1938-10-15 | 1939-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-04-15 | 1942-10-15 | 1943-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-04-15 | 1946-10-15 | 1947-04-16 | $7700.00 | Window Closed / Lapsed |