US2944930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiberboard
Assignee: Celotex Corp
•
Filing: 1957-04-16
•
Granted: 1960-07-12
•
Expires: 1977-04-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Arthur B Bush
- 👤 Alice C Weil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:59
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/001; C04B20/00; C04B20/10; C04B20/1018; C04B20/1029; D; D21; D21J; D21J1/00; C04B2111/00; C04B2111/20; C04B2111/28; C04B2111/52; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
AN INCOMBUSTIBLE HEAT INSULATING AND SOUND ABSORBING FIBERBOARD COMPRISING BY WEIGHT NOT LEAS THAN ABOUT 60% MINERAL FIBER TOGETHER WITH NOT MORE THAN ABOUT 40% COMBUSTIBLE FIBER AND THE PRODUCT OF THE REACTION IN ACID SUSPENSION OF BETWEEN ABOUT 1.5 TO FIVE PERCENT SOLUBILIZED PROTEIN AND 1 1/2 TO 10% SODIUM BENTONITE.
Claim 2
Dependent Claim
52 words
AN INCOMBUSTIBLE HEAT INSULATING AND SOUND ABSORBING FIBERBOARD COMPRISING BY WEIGHT NOT LEAS THAN ABOUT 60% MINERAL FIBER TOGETHER WITH NOT MORE THAN ABOUT 40% COMBUSTIBLE FIBER AND THE PRODUCT OF THE REACTION IN ACID SUSPENSION OF BETWEEN ABOUT 1.5 TO FIVE PERCENT SOLUBILIZED PROTEIN AND 1 1/2 TO 10% SODIUM BENTONITE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |